Maintaining internal conditions within in an organism is a characteristic of life known as

homeostasis.

Explanation:

All living organism on this planet have the ability to change or regulate the environmental conditions with in their bodies that keeps them and their body in a stable positions irrespective of the changing  external environment. This mechanism of regulation is known as homeostasis.

For example - we start shivering , when our body faces a temperature lower than the normal room temperature to maintain constant internal temperature for proper functioning of internal organs and systems.

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.