Question

which was charles darwin’s contribution to the study of biology?
he was the first person to recognize that organisms change over time.
he believed that organisms adapted through the inheritance of acquired traits.
he explained how traits are passed from parents to offspring.
he proposed that natural selection is the primary mechanism of evolution.

Explanation:

Charles Darwin's key contribution was proposing natural selection as the primary mechanism of evolution. The first option is incorrect as others recognized organisms change over time. The second refers to Lamarck's acquired traits idea. The third is about inheritance of traits (not Darwin's main focus). The fourth option matches his proposal of natural selection driving evolution.

Answer:

He proposed that natural selection is the primary mechanism of evolution.