Which statement about adaptations is correct as it pertains to the scientific theory of evolution? need asap !

a
adaptations, which are beneficial genetic traits, are critical to the survival of a species by providing alternative ways to adjust to a changing environment and prevent extinction.

b
adaptations, processes in which a single surviving organism chooses to change its traits, allows a species to redevelop variability and to increase in numbers.

c
adaptations, processes in which an organism physically changes its environment, provide a way for a species to decrease its numbers to prevent competition.

d
adaptations, which are learned behaviors, allow organisms to learn how to survive in any environment and predict environmental changes in order to prevent extinction of the species