Question

select the text from the paragraph that best helps you understand that fusion means combining. there may be more than one correct choice.
with age, the human skeleton undergoes a process of bone fusion. newborns’ bones are spongy and give way to pressure because they are made primarily of cartilage. these malleable bones make it easier for a newborn to pass through the narrow birth canal. over time, however, the bones gain more calcium and join together, forming the 206 bones that make up an adult’s skeletal structure.

Explanation:

The text that directly defines fusion as combining is the final sentence, which explains that over time, newborns' malleable bones gain calcium, join together, and form the 206 bones of an adult skeleton. This explicitly shows fusion means bones joining/combining.

Answer:

Over time, however, the bones gain more calcium and join together, forming the 206 bones that make up an adult's skeletal structure.