Which one of the following is not a function of an ecosystem?

Select the correct option for the following processes:
$P$ - Formation of organic components from inorganic components
$Q$ - Formation of inorganic components from organic components
Select the correct option for $P$ and $Q$.

Which of the following characteristics can be observed in ecological succession?

Which light is transmitted by water?

Select the incorrect statement from the following.

In which trophic level does the Sparrow belong as a consumer?