Question

1. which sentence best describes this passage?

a. geologists are still unsure about how rocks are formed.
b. rocks are everywhere and geologists classify them into three different groups.
c. rocks have been studied for a long time and geologists are still learning about the way they are formed.
d. there are three types of rocks and they are all formed the same way.

Explanation:

To solve this, we analyze each option:

• Option a: If the passage doesn’t say geologists are “unsure” (maybe they have some understanding), this is incorrect.
• Option b: If the passage’s main focus isn’t just “rocks are everywhere + classification into three groups” (maybe it’s about formation/study), this is incorrect.
• Option c: Matches a common theme in geology: rocks have a long study history, and geologists continue learning about their formation (consistent with how scientific understanding evolves).
• Option d: Incorrect, as different rock types (igneous, sedimentary, metamorphic) form in distinct ways.

Answer:

c. Rocks have been studied for a long time and geologists are still learning about the way they are formed.