Which of the following countries has the highest population density?

Which environmental conditions are available for organisms that produce a large number of offspring at once versus those that produce only one offspring,considering their life history traits and the constraints imposed by biotic and abiotic factors?

The basic unit of animal population which is communal interbreeding,in a species is known as

Sex ratio is the

According to the $1991$ census,the population density of Madhya Pradesh is:

$A$ population is correctly defined as having which of the following characteristics?
$(A)$ Inhabiting the same geographical area
$(B)$ Individuals belonging to the same species
$(C)$ Possessing a constant and uniform density and dispersion