(PLS HELP DUE IN 5 MINS) examine the graph below showing a comparison of transportation and emission trends in the united states over the years 1980-2015. which statement best describes the trend for the six common pollutants, as shown in the graph? a) the clean water act addressed the six major pollutants that were damaging the ecosystems.
b) the decline in vehicle miles traveled and US population correlates with a drop in air pollution
c) the 1990 amendments to the clean water act addressed the sources of acid rain, smog, and toxic air pollutants
d) a conversion to 100% renewable resources for energy harnessing and electricity production caused a reduction in air pollution

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.  

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c. is the correct answer