Question

question 17 of 29
what is the source of coal?
a. modern forests
b. crystallized magma
c. compressed ancient plants
d. compressed ancient sea life

Explanation:

Coal is formed from the remains of ancient plants that were compressed over millions of years under high - pressure and heat conditions. Modern forests are not the source as coal formation is an ancient process. Crystallized magma forms igneous rocks, not coal. Compressed ancient sea life forms oil and natural gas in many cases, not coal.

Answer:

C. Compressed ancient plants