I think its B. It sounds familiar
Answer:
The word biology is derived from the greek words /bios/ meaning /life/ and /logos/ meaning /study/ and is defined as the science of life and living organisms. An organism is a living entity consisting of one cell e.g. bacteria, or several cells e.g. animals, plants and fungi
Digestion begins in the mouth. Saliva contains enzymes which begin to break down food. The mouth also uses the teeth and jaw to mechanically break down food.
A) Another living cell (sry if wrong)
When the ground subsides it can become lower than the surrounding terrain, forming a basin.
Since water, which carries sediment, flows downhill, sediment will collects in these basins.
If enough sediment collects, compaction and cementation will turn it into sedimentary rock.