Question

which of the following did darwin study that led to the understanding of natural selection? trees finches tigers jellyfish

Explanation:

Darwin's study of finches on the Galápagos Islands was crucial. He observed variations in their beak shapes. These variations were related to their different feeding habits. Over time, the finches with beak shapes suitable for their environment (like food availability) survived and reproduced more. This showed how natural selection works - organisms with traits beneficial to their environment are more likely to pass on their genes. Trees, tigers, and jellyfish were not the main focus of his work leading to the understanding of natural selection in the same way as the finches.

Answer:

finches