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

Options

A. Both Assertion and Reason are true and Reason is the cprrect explanation of Assertion
B. Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion
C. Assertion is true, but Reason is false
D. Assertion is false, but Reason is true

Answer

A

Explanation

Breakdown of complex organic matter into simple inorganic raw materials such as carbon dioxide, water and various nutrients by the activity of microorganisms, is known as decomposition. The chemical quality of detritus or climatic factors regulate the rate of decomposition of dead animals and plants parts (detritus).
At high atitude , the temperature becomes very `(lt10^(@)C)`.
It greatly reduees the activity of microbos, principal composers. 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.