Natural or human activities influence and alter the environment causing a disturbance and imbalance. To survive the altered or the changed environment species must adapt.
What is adaptation?
Adaptation is the biological process of adjustment of the features like physiology, reproductive rate, behaviours, physical attributes etc. to the changed conditions of the environment.
Migration is the movement of organisms from one place to another temporarily due to harsh climatic and weather conditions. The species cannot alter the environment back.
Therefore, option B. adaptation is the way species can survive the altered environment.
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