Growing up, darwin saw that farm animals with preferred traits were chosen for breeding. those chosen animals usally produced offspring with the preferred traits. this best illustrates the process of?

natural selection

The ones that survive the best with their traits in their natural environment go through natural selection for their best traits.

Artificial Selection

Explanation:

Artificial selection is the intentional reproduction of individuals in a population that have desirable traits. In organisms that reproduce sexually, two adults that possess a desired trait — such as two parent plants that are tall — are bred together.

b. the carbon cycle ensures living things have a source of hydrogen