Natural selection does not always result in an increase in genetic diversity.
a. true
b. false

The answer is "a. True".

Genetic variation is a proportion of the genetic contrasts that exist inside a population. The genetic variation of a whole species is regularly called genetic diversity.  

Genetic variations are the distinctions in DNA sections or genes  among people and every variety of a quality is called an allele. For example, a population  with a wide range of alleles at a solitary chromosome locus has a high measure of genetic variation. Genetic variation is basic for normal choice since common choice can just increment or reduction recurrence of alleles that as of now exist in the population.

it would affect precipitation by causing flooding in some areas of the world due to climate increasing, causing the glaciers in the northern and southern pole of our planet to melt.

i wish you would have provided choices to simplify it and allow me to give an exact answer.

the answer is "a.) well–developed vascular system."

explanation: