LIFE SCIENCE

Detailed explanation-1: -Natural disasters and catastrophes are density independent factors.

Detailed explanation-2: -The two examples of density independent factors are natural disasters and human activity. Natural disasters, like wildfires, are factors that limit population sizes irrespective to density of the population.

Detailed explanation-3: -Generally natural calamities, climate changes, and environmental stresses are the factors of density-independent factors.

Detailed explanation-4: -Density-independent factors are not influenced by a species population size. All species populations in the same ecosystem will be similarly affected, regardless of population size. Factors include: weather, climate and natural disasters.