This is a diagram of the ear.

Which is the function of structure X?

It sends information to the nerve due to fluid vibrations.
It funnels vibrations into the ear canal.
It sends information from the outer ear to the middle ear.
It vibrates to send a message from the middle ear to the inner ear.

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.