16) all but one factor contributes to water pollution. that factor is a) acid rain. b) motor oil runoff. c) ozone depletion. d) fertilizer runoff.

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

that is wrong, its not thymus.