Increase in body mass is considered as....

In which of the following is growth observed?

Select the incorrect statement from the following.

Which characteristic of living organisms ensures that the population of each species remains limited?

Which of the following pairs represents the defining features of living organisms?

Statement $A$: The number of individuals of each species remains limited due to death.
Reason $R$: Due to death,the materials forming the body of living organisms return to the environment.
Which option is correct for Statement $A$ and Reason $R$?