Specificity-principle which refers to training for an activity or isolating the specific muscle groups.....
Natural selection. Only spiders that were more resistant to the pesticide lived through the first spraying of the pesticide, thus we're the only ones that could reproduce. This in turn made the offspring of the previous generation more resistant as well; thus making the pesticide less effective.
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The answer is A they can act as agents of natural selection. Hope this helps.
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but i think its the amount of water
Explanation:
sorry if im wrong