Folding of rock layers occurs where pieces of the earth's crust
a.
slide sideways without pushing into each other.
b.
do not move at all.
c.
gradually stretch apart and become thinner.
d.
gradually squeeze together and move upward.

Folding of rock layers occurs where pieces of the Earth's crust gradually squeeze together and move upward

Option D

Explanation:

Rocks become folded when the Earth's outside layer or crust is compacted. Pressure (squashing) happens as structural plates are pushed together and the outside layer ends up shorter and thicker, building mountain extents like the Alps or Himalayas. The stones are collapsed and transformed at profundity.  

Folds result from the moderate distortion of rocks. This happens at the underground where the stones are experiencing the squeeze and temperatures are higher.

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.