Which type of population becomes more efficient in all work?

The average natality rate in our village is $25$, the average mortality rate is $24$, immigration is $2$, and emigration is $3$. What is the net increase in the population?

Explain the characteristics of a population.

Find the odd one out with respect to population attributes.

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)

Natality of a region is assessed by the rate of . . . . . . of individuals per unit area,per unit time.