Answer
a. Reproduction; c. Growth; d. Irritability; e. Excretion
are all essential for the maintenance of life.
Work Step by Step
Reproduction is essential because cell division within the body is important and production of offsprings is also necessary.
Internal cell growth and external bodily growth is essential for proper functioning.
Excretion is essential because the process removes wastes from the body and facilitates its healthy maintenance.
Irritability, also known as responsiveness, is the ability to sense and react to changes happening in the environment around us.
