Lampreys are known to attach themselves to fish. in doing so they rasp off a section of the fish with hard keratinized structures and "feed" on the blood and fluid that oozes into their oral cavity. fish can survive with a lamprey attached, but they have to expend extra energy swimming with the lamprey attached. this association would be designated a:
a) mutualism.
b) parasitism.
c) predation.
d) commensalism.

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.  

a and c are the answeres

true is the