-Properties that can be observed without changing the identity of the object or substance
-Color, shape, size, density
The neuroendocrine system is composed of nerve impulses and hormones circulation. This system involves the glands which secrete numerous hormones, for maintaining bodily functions such as, homeostasis, and other physiological functions. The release of oxytocin, vasopressin, etc. are a part of this system.
C they have different functions i think its the most accurate (btw this is MY opinion)