Why are energy transformations necessary in living organisms?

The ionization of a sodium atom to produce $Na^+$ is an example of:

In living organisms,complex traits are the result of:

Metabolic reactions occurring in a cell are the result of which of the following?

Cells acquire and use energy to synthesize,store,degrade,and eliminate substances through chemical reactions called:

The process of forming large molecules from small molecules with the help of enzymes in the body is $P$.
The process of forming small molecules from large molecules with the help of enzymes in the body is $Q$.
What are the processes $P$ and $Q$?
$P \quad\quad\quad\quad\quad Q$