The "law" of faunal succession:
a. was developed by theoretical biologists to explain evolution.
b. was passed in congress to dictate equal teaching of different theories of origins.
c. was developed by an engineering geologist to aid in construction projects.
d. requires that evolution occurred.
e. requires that evolution was a catastrophic process.

Option D, Requires that evolution occurred

Explanation:

As per the law of Faunal Succession, the strata in a sedimentary rocks consists of fossils of different time period that are arranged one over the other in a vertical manner. This shows that each vertical layer consist if fossils that have evolved from the previous fossilized species.

This was found by  geologist William Smith who later used this vertical strata for determining the age of rock and sediments based on the rock of fossils.

Hence, Option D is correct

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.  

the titanic would be the correct answer