Cells are made up of molecules. Why then do we say that the structural unit of a living thing is a cell and not a molecule?

Molecule is a non- living structure, but they are responsible for assembling in various ways to create the parts of cells.

Explanation:

Molecules cannot function independently whereas when they combine they give rise to a functional unit called cell. This is the reason why cell is called a functional unit of life and not molecules.

the function of the protein macromolecule is to move things in and out of the cell and transport other molecules in the body. there are many functions of proteins. they are the basic building blocks of living things and are responsible for the growth and repair of body cells and tissues.

explanation:

it's c. (to reduce the greenhouse effect/carbon gasses)