Question

Which of the following process represents coalification?
(0) Sinking of trees and plants into swamps.
(ii) Formation of spongy dense material from dead and decaying
plants.
(iii) Gradual changes in the physical and chemical properties of coal
in response to temperature, pressure, and time.
(iv)
Accumulation of dead trees and plants layer upon layer beneath
the earth's surface.​

Answer 1

Answer:

the answer is 3 it is right