Answer:
<u><em>a reliable source </em></u>
Explanation:
There are four major classes of biological macromolecules:
carbohydrates.
lipids.
proteins.
nucleic acids.
B. Consumers depend on producers to make food using sunlight. This is the right option.
A change in the substance by temp, color,
It would disrupt the ecosystem by greatly reducing the population of a few species.
