Which contribute to a positive population growth?

    A positive growth rate means a population is increasing. The three main factor affecting population growth are

it u understand what he thought at the time and let u know more about him then what third person would of known probably. hope this : )

answer: b (host)

viruses use the cells of living organisms to reproduce. the cell which is used by virus is called as "host cell". it is a living cell in which virus multiplies, example bacteria, plant or an animal cell.

in this, the virus is a parasite, which uses host cell for its benefit (reproduction) by using the cell machinary of host cell.