I think it is A if not it is B
The correct answer is "acetylcholine".
Acetylcholine is the primary efferent neurotransmitter of the central nervous system. Acetylcholine functions in the autonomic nervous system as a neurotransmitter in the autonomic ganglia of both parasympathetic and sympathetic nervous system. It also functions as the primary neurotransmitter for the parasympathetic nervous system. Acetylcholine also functions as the neurotransmitter released by motor neurons at the motor end plate to stimulate muscle excitation-contraction coupling.
What’s the rest of the question
Answer:
The answer is third example
Selective adaptation is when we view a stimulus with a specific property, and the neurons tune to that property fire, eventually becoming fatigued.
Neurons tune to a particular attribute fire when we see a stimulus with that property; over time, this firing fatigues the neurons or causes them to adapt. The neuron's firing rate drops due to this adaptation and fires less often when the same stimulus is provided to it again right away.
For instance, a page of plain black text on a white backdrop will undoubtedly capture your attention and make it easier for you to identify important information. However, if you keep viewing pages and pages of mainly neon pink highlights, you'll probably grow accustomed to them, and they will eventually stop drawing your attention.
To learn more about selective adaptation: brainly.com/question/15876727
#SPJ4