The type of genetic drift that follows the colonization of a new habitat by a small group of individual is called

Correct Founder Effect

The founder effect is the effect that occurs when the newly isolated population is founded by a small number of individuals having a limited genetic variation as compared to the larger population from which they migrated.

It occurs when there is low genetic variation due to the reduction in the size of a mating population. It happens when there is decreased genetic diversity that occurs as a result of small colonies of individuals from the original population that remain inaccessible to other colonies.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.