Which of the following statements is true? The earth's core is made of liquid metal. Convection currents in the mantle cause the movement of crustal plates. The earth's crust is very hard and strong. It is difficult for magma to break through. The presence of sedimentary rocks means the area was once near an active volcano.

B. Convection currents in the mantel cause the movement of crustal plates.

Explanation:

This process is what causes plate tectonics, and does occurs in nature. All other options were false.

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.