Question

Coal is produced after a long time decay of
a. animals
b. fossils
c. wood
d. all

Answer 1

c. wood

Answer 2

all, the coal formed of wood is called peat coal...coal is formed under high pressure

Answer 3

http://en.wikipedia.org/wiki/Coal#Formation

Answer 4

It's vegetation right? Not necessarily fossils?

Answer 5

there is no decaying in the coal formation....decay means decomposition....coal is formed by the high pressure and sometimes temperature