Select the correct answer.
Which is the most accurate description of an ecosystem?
A.
An ecosystem consists of a biological community—the physical and chemical factors—that make up its abiotic environment.
B.
An ecosystem consists of the biological community that occurs in some locale.
C.
An ecosystem consists of the biological community that occurs in some locale and the chemical factors that make up its biotic or abiotic environment.

C. An ecosystem consists of the biological community that occurs in some locale and the chemical factors that make up its biotic or abiotic environment.

Explanation:

Every ecosystem has two factors i. e. biotic factors and abiotic factors. Biotic factors consist of living organisms such as microorganisms, fungi, plants and animals, while abiotic factors include all non living materials of the environment such as temperature, light, water, gases etc. All the living organisms are depend on these abiotic factors for their growth and development.

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