Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Farmyard manure or composts application increases water holding capacity of the soil.
Reason (R) : Compost and FYM application increases the soil temperature by 3 - 4$^\circ$C.
In the light of the above statements, choose the most appropriate answer from the options given below :