text 1
while researchers are still learning about how the appendix serves today’s human body, some scientists think this organ may have been essential to our ancestors. one theory is that, in the past, the appendix was an important organ to a plant - eating ancestor of humans. back then, the appendix may have been much larger to help humans digest tough foods like tree bark. in modern humans, though, it is only a small pouch attached to the large intestine.

text 2
humans once needed wisdom teeth to survive, but now these molars at the back of the mouth are less necessary and often cause problems. wisdom teeth were essential to early human ancestors, helping them chew their tough, uncooked food. modern man’s food, though, is typically cut up, cooked, and easier to eat, making wisdom teeth largely unimportant. beyond just diminished utility, though, wisdom teeth can cause trouble for many people; they can become impacted in the jaw, cause pain, and need to be extracted.

which sentence best combines the main, or central, ideas of both texts?
- wisdom teeth and the appendix often need to be surgically removed because they cause significant problems in modern humans.
- wisdom teeth and the appendix may have been essential to our human ancestors, but their utility has changed over time.
- the appendix and wisdom teeth are important parts of the human body, helping us process tough, chewy foods that are hard to digest.

Question

text 1
while researchers are still learning about how the appendix serves today’s human body, some scientists think this organ may have been essential to our ancestors. one theory is that, in the past, the appendix was an important organ to a plant - eating ancestor of humans. back then, the appendix may have been much larger to help humans digest tough foods like tree bark. in modern humans, though, it is only a small pouch attached to the large intestine.

text 2
humans once needed wisdom teeth to survive, but now these molars at the back of the mouth are less necessary and often cause problems. wisdom teeth were essential to early human ancestors, helping them chew their tough, uncooked food. modern man’s food, though, is typically cut up, cooked, and easier to eat, making wisdom teeth largely unimportant. beyond just diminished utility, though, wisdom teeth can cause trouble for many people; they can become impacted in the jaw, cause pain, and need to be extracted.

which sentence best combines the main, or central, ideas of both texts?
- wisdom teeth and the appendix often need to be surgically removed because they cause significant problems in modern humans.
- wisdom teeth and the appendix may have been essential to our human ancestors, but their utility has changed over time.
- the appendix and wisdom teeth are important parts of the human body, helping us process tough, chewy foods that are hard to digest.

Accepted Answer

# Brief Explanations:
- Analyze Text 1: The appendix was essential for human ancestors (digesting tough foods) but is now a small pouch with less utility.
- Analyze Text 2: Wisdom teeth were essential for early human ancestors (chewing tough food) but are now less necessary and often problematic.
- Evaluate Option 1: Text 1 does not mention the appendix causing problems or needing removal, so this is incorrect.
- Evaluate Option 2: It aligns with both texts' main ideas—both organs were essential to ancestors but their utility has changed (appendix is smaller/less useful, wisdom teeth are less necessary/problematic).
- Evaluate Option 3: The texts show these organs are not as important in modern humans for processing tough foods, so this is incorrect.

# Answer:
Wisdom teeth and the appendix may have been essential to our human ancestors, but their utility has changed over time.

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