I just took a test in school today. What question was I asked?

Question I was asked: Which rock is most likely to contain fossil seashells?


I just took a test in school today. What question was I asked?

Question I was asked: In a large forest with many animals, there are only a small number of bears. Which of these most likely limits the population of bears in the forest?


I just took a test in school today. What question was I asked?

Question I was asked:
Which of these explains how a trench can form?