Answer :

Final answer:

Galapagos finches' beak size, shape, and body size changing due to the evolution by natural selection.

Explanation:

Beak size, beak shape, and body size in Galapagos finches are changing due to the evolution by natural selection. Biologists Peter and Rosemary Grant observed changes in finches' beaks correlated with weather conditions and food availability, leading to adaptation for survival. Birds with advantageous beak sizes survived and reproduced, causing a shift in the population's characteristics.

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