Which one of the following is the correct sequence of the decomposition phase in the composting process?
(1) mesophilic phase
(2) cooling phase
(3) thermophilic phase.
(4) maturing phase
1
(1)-(2)-(3)-(4).
2
(1)-(3)-(2)-(4)
3
(3)-(4)-(2)-(1)
4
(4)-(3)-(1)-(2)