Question

all evolutionary changes that allow a species to change in response to the environment are originally a result of
a beneficial dna mutations.
b movement to new environments where survival is easier.
c cross-breeding with other species of closely related organisms.
d adaptations that organisms make to the environment during their lifetimes.

Explanation:

Evolutionary changes that enable species to adapt to their environment originate from genetic variations. Beneficial DNA mutations introduce heritable changes that can improve survival and reproduction, which are then selected for over generations. Option B does not create new heritable traits for adaptation. Option C is rare and not the original source of most evolutionary changes. Option D describes non-heritable acclimation, not evolutionary change.

Answer:

A. beneficial DNA mutations.