Please help me, I been stuck on this.

I would put it in this order

3

4

2

1

Explanation:

It makes the most sense in reading it all together

hope this helps

endo:

regulates body hormones, aldosterone, vasopressin

neural:

signal, regulates body using electric signals, reflex

endo has to do with hormones; aldosterone and vasopressin are both hormones. i also had this question and got it right : d

the contamination

we are putting to many trash.