Answer:
Geologists search rivers, mountains, and caves for clues about how and when the Earth was formed.
Explanation:
This would be an important idea to include in your summary because it contributes to the central idea of the entire passage. The passage is about the work of geologists, and this sentence/idea is the main idea.
Answer:
D. It's more surprising that Wisdom hatched a chick at age 68 than it is that she has lived to be 68 years old.
Explanation:
It looks to be that choice "A" has been cut off. If not, then C should be your answer!
