Which of the following is least likely to change the gene pool of a population of chipmunks?
a) a pesticide poisons and kills a large number of chipmunks.
b) a group of chipmunks moves to a new habitat.
c) a number of chipmunks die due to old age.
d) a genetic mutation causes some of the chipmunks to have larger eyes.

I believe the answer is: c) A number of chipmunks die due to old age.

When organisms died due to old age, they are most likely to used up their productive capability to pass up their genes as much as possible.
This would create a situation where the gene pool of the future generation would be relatively similar  with the current generation.

The question ask to choose among the following choices that is least likely to change the gene pool of a population of chipmunks and the best answer among the following choices is in letter C. A number of chipmunks die due to old age. I hope you are satisfied with my answer and feel free to ask for more 

Marshall plan is the answer.

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