The given figure represents different factors affecting population density `(N)`. If `B =` natality `D =` mortality ,`E =`emigration and `I = ` immigration, then select the incorrect option regarding these.

Options

A. `B` and `D` are most influential factors under normal conditions while `I` and `E` become important in special conditions
B. In a new habitat just being colonised, I become more important than `B`
C. `B` and `I` cause positive changes in `N`
D. `I` is generaly equal to `E`

Answer

D

Explanation

Immigration is not necessarily equal to emigration in a population.