Which is regarded as a density-independent factor in the growth of natural populations?

Density independent factors refer to any influences on a population's birth or death rates, regardless of the population density.

Explanation:

Density - independent factor any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population. An example of such factor is an earthquake, which will kill all members of the population regardless of whether the population is small or large.