Which sentence best describes the main idea of the passage?

Choose three details from the passage that best support the inference that fossils are good tools to use for understanding the past.

Read the dictionary entry.

Read the sentences.

Part A: What inference can be made about the author’s use of fossils to explain Earth’s history?

Part B: Which of the sentences from the passage best shows the inference made in part A?

What inference can be made about why we find different types of fossils in different areas on Earth? Explain using key details from the passage to support your answer.