Final answer:
The fossil record shows that A. the diversity of life on Earth has changed over time.
Step-by-step explanation:
The fossil record is a collection of all known fossils, providing a chronological account of life's evolution on Earth. Fossils are the preserved remains or traces of organisms from past geological periods. Studying the fossil record helps scientists understand the history of life, evolutionary processes, and environmental changes over time.
The fossil record shows scientists that the diversity of life on Earth has changed over time. Fossils provide solid evidence that organisms from the past are not the same as those found today and show the gradual evolutionary changes over millions of years. Through studying fossils, scientists have been able to recover highly detailed records showing the evolution of various species, such as humans and horses.