Question

How are organic sedimentary rocks different from other sedimentary rocks?

A. They are formed from lava.
B. They are made up of once-living things, like shells.
C. They are formed from the fragments of worn-down rocks.
D. They are made from chemical reactions or by evaporation.

Answer 1

I think the answer is b online I found that Organic sedimentary rocks form from the accumulation and lithification of organic debris, such as leaves, roots, and other plant or animal material

Answer 2

Sedimentary rocks are made of smaller pieces (like sand or mud), called sediments, that pile into layers. As pressure on the sediment increases over time, minerals act like glue, cementing them into solid rock. The three main types of sedimentary rocks at Grand Canyon are sandstone, shale (or mudstone), and limestone.