AIEEE Questions

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Any factor limiting the size of a population whose effect is not dependent on the number of individuals in the population, then such factor is called Density Independent Factor. It is things that the organisms have no control over.

Here in the given options, food shortage and disease are factors that are dependent on the number of population but Floods have no dependency.

Some examples of density independent factors are :: Earth quake, fires, volcanic eruptions, floods, and  all natural calamities.

Sound waves cannot be transmitted through vacuum. 

Marasmus usually is associated with a deficiency of Calories.

Economics is the study of how society manages its scarce resources i.e, Limited wants & unlimited resources.