The density of human population is determined predominantly by:

Which formula is used to calculate population density?

Read the given statements carefully and select the correct ones:
$(1)$ Individuals of the same species together form a population.
$(2)$ Mortality is an important factor for population growth.
$(3)$ Natality (birth rate) is an important factor for the immediate increase in population size.
$(4)$ In commensalism,both organisms benefit from the interaction.

In demography,we study:

The population density of India is:

In a population,there are $100$ small-sized Parthenium plants and only $1$ large-sized Banyan tree. Which of these has a lower population density?