# The functioning of an ecosystem is governed by :-

$\begin{array}{1 1}(a)\;\text{Interaction of plants & animals}\\(b)\;\text{Small population size}\\(c)\;\text{Climatic & edaphic factor}\\(d)\;\text{Interaction of living & non living components}\end{array}$

The functioning of an ecosystem is governed by climatic & edaphic factor
Hence (c) is the correct answer.