👉 Underpopulation, also known as a population deficit, refers to a situation where there are fewer people in a particular region or country compared to the total number of people expected to be living there. This can occur due to various reasons such as natural disasters, migration, aging population, and technological advancements. In terms of geography, underpopulation can be defined differently depending on the location. For example, in developed countries with high birth rates, underpopulation is often considered a result of immigration or urbanization.