Question

which of the following factors do you think can affect the size and structure of a population? the number of individuals who enter a population the number of individuals who exit a population limitation of resources natural events human activity

Explanation:

The size and structure of a population are affected by the number of individuals who enter (immigration) and exit (emigration) a population. Human activity can influence migration patterns. Natural events can also impact population - for example, natural disasters can cause emigration. Limitation of resources can lead to emigration as individuals seek resources elsewhere.

Answer:

All of the factors mentioned (the number of individuals who enter a population, the number of individuals who exit a population, limitation of resources, natural events, human activity) can affect the size and structure of a population.