Which among these is the least in reducing indoor pollution?

a. having indoor plants
b. opening windows
c. installing hepa filters
d. increasing the house temperature

D. Increasing the house temperature

Explanation:

Increased level of temperature and humidity support the growth of microbes in the house and thereby pollute the indoor air. Indoor plants remove carbon dioxide and help in reducing indoor pollution. Likewise, entry of fresh air into the house by opening windows and use of HEPA filters also make the air of house free of pollutants.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.