An ecosystem contains
a. only the biotic (living) components of the environment
b. only the abiotic (nonliving) components of the environment
c. only the energy flow components of an environment
d. both the living organisms and the abiotic components of the environment
e. only the food relationships found in an environment

D. Both the living organisms and the abiotic components of the environment

Explanation:

An ecosystem does contain both biotic which are living organisms such as plants, animals, etc and abiotic factots which are the non living organisms such as water, air, etc.

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

i think that it is plants