The minimum death rate of a population is called:

The rate at which new born individuals are joining the population by reproduction is known as

If in a pond there are $20$ lotus plants of last year and through reproduction $8$ new plants are added. Then the birth rate is

Certain characteristic demographic features of developing countries are:

Select the correct option based on the number and size of offspring produced by the following organisms:
$I -$ Oysters,$II -$ Birds,$III -$ Pelagic fishes,$IV -$ Mammals
(Many small-sized offspring) $\quad$ (Few large-sized offspring)

Which of the following is $NOT$ a primary factor affecting population density?