Explain the difference between density dependent and density independent limiting factors.

Density-dependent factors often arise from biological phenomena, rather than from physical and chemical phenomena. Density-dependent factors are sometimes called regulating factors because of their potential for maintaining population density within a narrow range of values.
As for Density-independent means any force that affects the size of a population of living things regardless of the density of the population (the number of individuals per unit area). Density-independent factors often arise from physical and chemical (rather than biological) phenomena.

Then it is june the conclusion to the second sentence is just restating "if it is june then it is summer"