Which situation can result in negative population growth

The Answer would be “B”

Negative Birthrate;
At the extreme, other countries are experiencing negative population growth. Again, this means more deaths and emigration, or the leaving of a country, than births and immigration, or entering of a country

In answer “B” It’s clearly explaining that the death/birth ratio is high which means;

Death > Birth

This then concludes the statement that it is an example of negative population growth since there’s more people dying then coming into this world.

The answer is nucleic acid