Answer:
During stage 2, the death rate drops while birth rates remain the same.
Explanation:
The first option is not correct because this is a characteristic of the later stages in the DTM.
The second option is correct because, during stage 2, the death rate drops because of improved living conditions and healthcare, while the birth rates remain the same, leading to population explosion.
The third option is not correct because this is a characteristic of the last stage of the DTM.
The fourth option is not correct because such actions are usually taken in stage 3.