Which option correctly gives the adding processes of population change?

Correct answer: Births and in-migration

Direct answer: Option A—births and in-migration. Population change means a change in the number of people living in a particular area. An adding process increases that local number. First, a birth adds a new person to the population. Second, in-migration means people enter an area from another place and become part of its population. Thus, both processes add people. Option A is correct because both terms have an increasing effect. Option B is wrong: death removes a person and out-migration means a person leaves, so both reduce the local population. Option C is wrong because drought is an environmental condition, not a standard demographic adding process; it may influence migration or deaths but does not itself add people. Option D is wrong because out-migration reduces the local count, while disease is not an adding process. Memory cue: “births and in-migration bring people in.”