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

Why do organisms reproduce at the expense of energy even though reprod

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