I was born.

What does that mean?

My parents gave me the birth. How?

Sperm from my father combined with ovum of my mother gave birth to me.

Thus initially, I was just union of two living cells.

To which in nine months of pregnancy, my mother nourished and when my body took fully developed human shape she delivered me.

Thus, I was born as a child to my parents.

My parents were born similarly form their parents and so on. Thus entire world population of living animals and plants are produced in the same way. Once born, how does one remain alive? How does one grow?