These blotches are called what? the layer of the sun where these occur is called the what?

Sunspot are spots found on the sun's surface that occur because these regions have a lower temperature than the temperature of the rest of the solar surface, so it seems darker for our observation. It is a temporary phenomenon and is a region that concentrates high magnetic field due to reduced temperature.

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