Why are water conservation and pollution control important for future generations?
A
Waste and pollution will lead to less rainfall over land.

B
Waste will lead to less water in the oceans, rivers, and lakes.

C
Pollution will cause an increase in tourism in beach communities.

D
Pollution and waste will lead to a shortage of clean water for human use.

D

Explanation:

once we start to pollute the water channels there will be shortage of clean water for future generations

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation: