Assrtion : The rate of decomposition of detritus is reduced in the regions of high altitude.
It happens due to immobilisation of nutrients

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

C

Explanation

At high altitude, the temperature becomes very low `(lt 10^(@)C)`. It greatly reduces the activity of microbes, principal decomposers.
Nutrients immobilisation means tiding up of nutrients material with the biomass of microbes. This immobilisation prevents the nutrients from being washed out from the ecosystem.