Final answer:
Density-independent population regulation is the regulation of population in which the death rate is independent of the population size, influenced by environmental factors that operate regardless of the population density.
Step-by-step explanation:
Density-independent population regulation refers to the regulation of population in which the death rate is independent of the population size. It is influenced by environmental factors that operate regardless of the population density. For example, natural disasters like forest fires and volcanic eruptions are density-independent factors that can regulate a population. Disease transmission among individuals of the population may also be a form of density-independent regulation as it is not directly influenced by population density.