Question

which type of sedimentary rock is formed from remains of plants and animals?
chemical
clastic
intrusive
organic

Explanation:

Organic sedimentary rocks are formed from the remains of plants and animals. Chemical sedimentary rocks form from dissolved minerals precipitating. Clastic sedimentary rocks are made of fragments of pre - existing rocks. Intrusive rocks are igneous rocks, not sedimentary.

Answer:

D. organic