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.
A stopwatch would provide the most accurate measurement when sprinting
Rough and smooth ER is the two kinds
It’s c a producer a someone who produces a product so a farmer who raise corn, produces corn
I believe it would be 'D' because reprimand means to rebuke something.