Which of the following statements is correct?a. Population size of predators increases when their prey is scarce. b.Competition for resources is density-independent when food is plentiful. c.Disease is density-dependent because transmissionoccurs more easily when a population is large. d.A change in average temperature is a density-dependent factor because fewer organisms can acclimate to variations in temperature.

C. Disease is density-dependent because transmission occurs more easily when a population is large

Explanation:

The question examines the knowledge of concepts of factors affecting the population.

A population is the collection of organisms of a particular species, sharing a particular characteristic of interest, most often that of living in a given area.

Option A is false. The population size of predators decreases when their prey is scarce.

Competition in a population involves individuals contending in rivalry for resources.

Option B is false. Competition for resources is density-dependent when food is plentiful.

Option C is true.

Disease is an abnormal condition of a animal or plant in a population that causes discomfort or dysfunction .

The mode of disease transmission actually is density-dependent because transmission occurs more easily when a population is large.

The option D is false.

Temperature is an abiotic factor not a density dependent factor.

A change in average temperature is not density-dependent factor.

The temperature is the measure of cold or heat, often measurable with a thermometer.

C is therefore the correct option.