the distribution of the height of humans is a normal distribution. There are some vary tall people, and some vary short people but most people are in the middle. What is most likely true about this trait A. there are only two alleles for height B. being tall is a dominant trait C. it is controlled by several different genes D. it is a Mendelian trait.

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.  

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.