In gluconeogenesis:

The transformation of metabolites into one another occurs through a series of linked reactions. This is called $...........$.

Statement $X$: All the various biochemical reactions occurring in every cell of a living organism are collectively called 'metabolism'.
Statement $Y$: Growth occurs when the rate of anabolic processes is greater than the rate of catabolic processes.

Which of the following is true regarding energy transformation in living cells?

In living organisms,complex traits are the result of:

Assertion $A$: Many molecules participate in biochemical reactions.
Reason $R$: Biochemical reactions are metabolic reactions.
Which option is correct for Assertion $A$ and Reason $R$?