Answer:
The correct answer will be option an adaptation evolves quickly, because it is necessary for survival .
Explanation:
Adaptation is a trait or feature which has been acquired by the organism by the changes in physiology, structure and behaviour which are more suited to the environment.
Adaptation is a pre-requisite of natural selection and evolution which enables the organism to survive and reproduce. Adaptation or an organism is not an instant response but to become permanent in a population adapted trait must be passed on to the generations that involve gene level.
Thus, option an adaptation evolves quickly, because it is necessary for survival is the correct answer.
