Need some quick help with this:

burning fossil fuels and decomposition of dead organisms

The answer is burning fossil fuels.

Hello. This question is incomplete. The full question is:

"Which statements about fossils are true? Select all that apply.

a. They can help us interpret Earth's past.  b. They are great environmental indicators.  c. They are created from all living things that are buried.  d. They help us better understand modern-day life-forms and their ancestors."

All options are correct.

Explanation:

Fossils are preserved remains or remains of animals, plants or other living things on rocks, such as body molds or parts of the body, tracks and footprints. The totality of the fossils and their placement in rock formations and sedimentary layers is known as the fossil record. The word "fossil" derives from the Latin term "fossilis" which means "to be dug up".

In summary, we can say that fossils are extremely important. About them, we can say that:

They can help us interpret Earth's past.  They are great environmental indicators.  They are created from all living things that are buried.  They help us better understand modern-day life-forms and their ancestors.