What is uterus?

The life cycle of a butterfly is really intriguing. Butterflies develop from birth to death in four stages—in the first stage the female butterfly lays eggs; in the second stage the egg hatches and a caterpillar is born with only one job—to eat, eat, and eat; in the third Stage the fully-grown caterpillar stops eating, protects itself from outside by making a protective covering, and is known as pupa; in the final stage, the cocoon of the pupa breaks and a butterfly emerges. This is also called the reproductive stage when the butterfly has only one duty—to mate and lay eggs. 

(i) What is the process described above known as?

(ii) Name a few species which undergo the same process.

(iii) List three values which we can learn from this process.