Darwin proposed as the process that causes evolution to occur.

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Natural selection.

Explanation:

Natural selection is a term used for individuals in a population or species with favorable traits that help then survive in the wild. For example, a brown-colored mouse is more likely to blend in a forest setting rather than a white-colored mouse. Those with favorable traits are more likely to survive, and pass down their traits to offspring.

brain development. a child's brain undergoes an amazing period of development from birth to three—producing more than a million neural connections each second. the development of the brain is influenced by many factors, including a child's relationships, experiences and environment.

explanation: