Final answer:
The correct answer is option B, which states that a dynamic population is influenced by birth, death, and migration. These demographic processes are fundamental in understanding how populations change over time.
Step-by-step explanation:
The key demographic processes that cause population to change over time are influenced by various factors such as birth rates, death rates, and migration. With this in consideration, option B. Dynamic population influenced by birth, death, and migration is the correct answer because it encompasses all the primary factors that affect population dynamics.
Populations are not static; they are constantly changing due to births, deaths, and the migration of individuals into and out of populations. For instance, if the birth rates exceed death rates, there will be an increase in population size; conversely, if death rates exceed birth rates, the population size will decrease.