Question

What do wind turbines, hydroelectric dams, and ethanol plants have in common?

A. All produce electrical current with pollution
B. All use generators to produce electrical current
C. All convert gravitational potential energy to electrical current
D. All convert thermal energy to electrical current

Answer 1

Answer: B. All use generators to produce electrical current.

Step-by-step explanation:

The wind, water and ethanol all are the examples of renewable sources of energy. These can be used to generate electricity. The kinetic energy of the blowing wind, free flowing water and liquid like ethanol can be used to generate mechanical energy in the turbine which can help in generating the electricity in the generator.

Answer 2

option b is right that is  All use generators to produce electrical current