Question

question 1 what is this article mainly about? a. a small bone that scientists study b. a part of the jaw that all animals have c. the history of early humans d. the history of modern humans submit

Explanation:

To determine the main idea, we analyze each option:

• Option B claims "all animals" have a certain jaw part, which is likely too broad (not all animals have the same jaw structure).
• Options C and D focus on human history, but the options about a bone (A) and jaw part (B) suggest a scientific/biological topic. Option A, about a small bone scientists study, is more likely the main topic of an article (e.g., a scientific study on a bone).

Answer:

A. A small bone that scientists study