The area used to be covered by an ocean
Answer: solid
Explanation: Chemical reactions are those which involve rearrangement of atoms.
Chemical changes are accompanied by following changes:
1) Absorption or release of heat
2) Change in color
3) Formation of gas bubbles
4) Formation of a solid product called as precipitate
Example of formation of precipitate or solid in chemical reaction:![2AgNO_3(aq)+BaCl_2(aq)\rightarrow 2AgCl(s)+Ba(NO_3)_2(aq)](https://tex.z-dn.net/?f=2AgNO_3%28aq%29%2BBaCl_2%28aq%29%5Crightarrow%202AgCl%28s%29%2BBa%28NO_3%29_2%28aq%29)
Leaves (and probably other things as well) that have fallen make the soil richer from decay.
Answer:
The U.S. Federal Communications Commission (FCC)
Explanation: