What are the two types of effectors and how does each respond to stimuli?

The two effectors are sound. Sound is the  vibrations or movement of the air. And the ear is sensitive to a range of approximately 3 and 12 kHz (a tone can be measured as a sine wave). The change in pressure deforms the tympanic membrane which in turn activates frequency-coded neurons to fire.The second effector is eyes in sight. Your eyes respond to light. This should be right  because this is what one of my teachers said to me. Hope this helps

The answer is c the potato slice shriveled because water moved out of the slice into the salt solution