A relative complains of not being able to see very well at night when driving. She has also had dry skin and several colds over the last year. Which of the following vitamins is your relative most likely deficient in?

VITAMIN A

Explanation: Vitamin A is an essential vitamin needed by the body but it is needed in small amount because it cannot be synthesized by the body.

It is fat soluble and gotten from fruits and green leafy vegetables,milk,orange,cereals,cod-liver oil and eggs.

Vitamin A plays a vital role in the growth and development of the body and body tissues as well as maintaining a normal vision and a healthy skin so when vitamin A is deficient in the body,it is evidenced by poor vision especially poor night vision,and there is also damage to the skin and mucous membranes.

There is also weakening of the body defense mechanism (immunity ad inability of the body to produce blood cells(hematopoiesis)

From the question,the relative is experiencing poor night vision,dryness of the skin and frequent cold which indicates a deficiency of VITAMIN A

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.