The correct answer is:
Emigration because it means people are moving out, causing the population to decrease along with a death rate.
Step-by-step explanation:
if there are a high death rate and a large amount of emigration, populations will likely decrease. Emigration relates to an experience when an individual walked out to another place because of some reasons ( the most common one are: Rare resources, societal problems, depression, or solely because they required to try out their fate).