Explanation:
Biogenic sedimentary rocks are formed by the remains of the animals and plants via the biological process .
The two major groups are as follows -
Limestone - lt is made up of the exoskeletons of the mollusk , reef-forming corals, and foraminiferans .
Coal - it is made from the carbon in the dead and buried organic material and the wood of the dead plants which do not decay ( due to lack of oxygen ) but get petrified over the time .
