Why do organisms reproduce, even though reproduction is not as vital as respiration, excretion, etc. at the expense of energy?

Why do organisms reproduce, even though reproduction is not as vital a

1.	Why do organisms reproduce, even though reproduction is not as vital as respiration, excretion, etc. at the expense of energy?
Answer» Why do organisms reproduce, even though reproduction is not as vital as respiration, excretion, etc. at the expense of energy?