the hormone called plays an important role in synchronizing physiological function with the cycle of daylight and darkness.

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 cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.