Which of the following will dissolve in water
a. oil
b. salt
c. alcohol
d. sand

salt will dissolve

Explanation:

so if you put salt in water you notice the water changeing and its desloving just like how laxatives work like if you put powder in and stir and lay it down for couple mins it's clear and dissolved

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