An increase in food and a decrease in predators would most likely genetic variation in a population.
what’s the answer to put in the blank

An increase in available food is an environmental factor which brings about genetic variation in the population of a specie.

Explanation:

yes? sounds right, but you didn’t ask a question.

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d