Question

What are fossils ? In what way are they useful ?

Answer 1

Answer:

Fossils are very useful to the study of tectonic history. When a fossil of a given species is found on several modern continents, it gives a strong indication that these continents were previously unified. Fossils are also used to date sedimentary rocks.

Explanation:

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Answer 2

ᴀɴsᴡᴇʀ :-

Fossils of any kind are useful in "reading the rock record," meaning they help us decipher the history of the earth. They can help us determine the geologic age and environment (the paleoenvironment) in which they were deposited.