Answer:
It's sight
Thus, sight just is that power by which we are aware of the colors of material things.
What one means by an external sense is obvious: one of the five means by which we are directly aware of the world around us. They are sight, hearing, smell, taste and touch.
C)Neuron... hope it helps :)
The muscular tension. Hope I helped at all
C.) Digestion is not increased during the "fight-or-flight" sympathetic nerve response. It actually increases as a result of the parasympathetic nerve system response.
