Question

what is lifespan. explain different phase of lifespan?

Answer 1

the length of time for which a person or animal lives or a thing functions is called lifespan.The six stages of lifespan development are: Infancy, Childhood, Adolescence, Early Adulthood, Middle Age, Older Age. 
hope it helps

Answer 2

The period between birth and natural death of an organism is called as lifespan.

The 4 phases of lifespan are

• Juvenile

This the period after birth till reproductive organs are matured

• Reproductive

During this period organisms reproduce

• Senescence and ageing

It is characterised by deterioration in vital capacities of man

• death

The end of life of an organism.

hope this helps u❤️