A change most likeiy to result in two distinct phenotypes (and possibly, speciation).

a
stabilizing selection

b
directional selection

c
disruptive selection

d
acquired variation

Explanation:

Directional selection favors one extreme; stabilizing selection favors the middle of the range; disruptive selection favors both extremes and leads to two phenotypes.

true is the final answer!

tsd is temerature dependent sex determination.

tsd: it is a type of environmental sex determination in which the temperature experienced during embryonic/ larval development (ambient temperature for development) determine the sex of the offspring.

crocodile displays the tsd where the ambient temperature of the developing egg determines the individual's sex. for example in the american alligator's eggs, incubation at 33 ºc produces mostly males, while incubation at 30 ºc produces mostly females. so if the american alligator's egg will get the ambient temperature (33 degree celcius)during embryonic development from egg, the offspring will be male and same for the female sex determination.