Question 9
what have the scientific studies identified as the major cause of acid rain in the united states?
chemicals still in the atmosphere from the asteroid collision with the earth
excess solar radiation due to the depletion of the ozone layer
volcanic ash in the air
burning of fossil fuels that release sulfur and nitrogen compounds into the air

burning of fossil fuels that release sulfur and nitrogen compounds into the air

Explanation:

Acid rain results when sulfur dioxide  and nitrogen oxides are emitted into the atmosphere and transported by wind and air currents. Burning of fossil fuels to generate electricity.

Option (D)

Explanation:

Acid rain refers to the precipitation that occurs in association with acidic components such as Nitric acid (HNO₃) and Sulfuric acid (H₂SO₄).

A large amount of gases are emitted from the industries, factories, burning up of fossil fuels. These gases are primarily Sulfur dioxide (SO₂) and Nitrogen oxides (NOₓ), which are carried by the wind and air to the atmosphere. When these gases combines with water, Oxygen (O) and some other chemicals, then it give rise to the formation of Sulfuric and Nitric acid that mixes with the water and precipitates and falls back on earth in the form of rainfall, which is commonly known as the acid rain.

Thus, the major cause of acid rain in US is due to the burning up of fossil fuels that releases sulfur and nitrogen compounds into the air.

Hence, the correct answer is option (D).

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.