Which of the following developing countries has a high death rate?

Population explosion occurs due to

There is a continuous increase in the world's population growth rate. This is due to:

Housing problems,health problems,pollution problems,etc.,are primarily created by:

The ratio of birth and death rates according to the $1991$ census is:

Choose the correct causes for the population growth.
$I$. Decline in death rate
$II$. Rapid increase in $MMR$ and $IMR$
$III$. Rapid decline in $MMR$ and $IMR$
$IV$. Increase in the number of people in the reproductive age group
$V$. Rapid increase in the death rate