Question

some populations experience periods in which the population increases and then periods in which the population decreases. the defining factor of this type of population growth is that they increase and decrease in size at fairly regular intervals. what type of population growth is this?
irregular
cyclical

Explanation:

The question is about population growth types. Cyclical population growth is defined by populations increasing and decreasing at regular intervals, while irregular growth would be non - periodic. The description in the problem matches the definition of cyclical population growth.

Answer:

B. Cyclical