Answer:
The correct answer will be option D- It provides clues about how organisms have changed over time.
Step-by-step explanation:
Fossils are the remnants of plants and animals which were present millions of years ago. Fossils are formed due to the deposition of sand, silt, clay and mud over the dead and decayed parts of plants and animals inside a water body.
Since fossils are the present form of the past organisms, they are used by the evolutionary biologists as evidence to study the history of life on Earth related to their evolution and relationship with the existing species.
Thus, option D is the correct options.