Apopulation of snakes that eat small rodents enters a new habitat. in the new habitat, there are many species of rodents, and their populations are high because there are few natural predators. what will most likely be the effect on the genetic variation of the snake population?
genetic variation will increase because of a selective pressure.
genetic variation will increase because of a new habitat and food source.
genetic variation will decrease because of a selective pressure.
genetic variation will decrease because of a new habitat and food source.

Option B, Genetic variation will increase because of a new habitat and food source.

Explanation:

There are three positive scenarios about the new environment in which the snakes have entered -  

a) There are different varieties of rodent

b) The population of rodent is high due to less number of predators.  

c) Low population of predators other than the snakes (Limited competition)

Hence, snakes will have ample supply of food in the new sphere as there is very low competition among the predators (due to low population of other predators) and also there are varieties of rodent. Due to ample supply of food and limited competition with other predators , snake population will increase and thus the genetic variation will also increase due to increased rate of breeding.

Thus, option B is correct.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects