There are 50 lotus plants in a pond. 20 new plants were added through reproduction. The birth rate of lotus in a year is:

0.4

The correct answer is Option (1) → 0.4

The birth rate in a population is a measure of the rate at which new individuals are added to the population through reproduction. It indicates the reproductive capacity and potential growth of the population. To calculate the birth rate, we consider the increase in numbers with respect to the total members of the population.

There are 50 lotus plants in a pond. 20 new plants were added through reproduction. The population increased to 70 lotus we can calculate the birth rate as follows:

Birth Rate =20 /50 = 0.4 new plants per lotus plant per year.