The answer is C. The energy of the acacia tree is passed on to the impala.
The answer is the endogenous opiate.
The human body naturally produces its own opiates like substances and uses them as neurotransmitters. These substances include endorphins, enkephalins, and dynorphin, often collectively known as endogenous opioids. Endogenous opioids modulate our reactions to painful stimuli.
Fossils are the preserved remains, or traces of remains, of ancient animals and plants
Low concentration to high concentration
