This may not be !
which of the following is not caused by gravitational pull?

a. planets orbit a star

b. stars cluster together to form a galaxy

c. two atoms come together to form a molecule

d. gas and dust come together to form a planet

The answer that is not caused by a gravitational pull is two atoms come together to form a molecule because atoms form molecules because of the electrons, and not gravitational pull.

Therefore the correct answer would be,

Two atoms come together to form a molecule.

I hope that this has satisfied you.

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.