Is bird feather abiotic or biotic factor?
is fog in the morning abiotic or biotic?

Explanation:

a bird feather is biotic because it was made on a living thing. fog is abiotic because its not  living or was never living. i might be wrong about the feather tho.

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