Question

question 2/
think about the article. which of these is true about chins?
a. chins could tell scientists why modern humans lived on.
b. chins are the small bones that all ancestors have shared.
c. chins have always been good at protecting the jaw.
d. chins could tell scientists why humans are like animals.

Explanation:

To solve this, we analyze each option:

• Option B: Not all ancestors had chins (e.g., earlier hominids), so incorrect.
• Option C: Chins are not primarily for jaw protection; their function is related to human evolution, so incorrect.
• Option D: Chins distinguish humans from animals (animals don't have chins), so this is wrong.
• Option A: Chins are a unique human feature, and studying them can help scientists understand why modern humans (with chins) survived/evolved while other hominids didn't, so this is correct.

Answer:

A. Chins could tell scientists why modern humans lived on.