Help me I know nothing ab science lol

Ineed the definitions of all of these words nasap i will give 1o points to whoever awnsers

Why is excretion necessary to maintain homeostasis?

1. which of the following is correct regarding opiates/opioids: a. they all have a natural component as a starting pointb. they have low addiction possibilitiesc. methadone binds to some of the same receptorsd. a and care correcte. all are correct