Choose the equation that represents the calculation of population density at time t+1, given the following representations:

If natality is represented by –B

If mortality is represented by –D

If immigration is represented by –I

If emigration is represented by –E

If population density is represented by –N

   N _{t + 1} = N _t + [(B + I) – (D + E)]

The correct equation is (b) N _{t + 1} = N _{t +} [(B + I) – (D + E)]

This equation represents the calculation of population density at time t+1. It takes into account the changes in population due to natality (B), mortality (D), immigration (I), and emigration (E).

In the equation, N _t represents the population density at time t. The terms within the brackets [(B + I) – (D + E)] represent the net change in population due to births, deaths, immigration, and emigration. Adding this net change to the population density at time t (N _t) gives us the population density at time t+1 (N _{t + 1}).

By using this equation, we can assess how the population density changes over time based on the rates of natality, mortality, immigration, and emigration.