tidal energy and hydropower geothermal energy and hydropower wind energy and tidal energy geothermal energy and wind energy
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Which alternative energy resources use gravitational energy to make electricity?
Possibilities:
- tidal energy and hydropower
- geothermal energy and hydropower
- wind energy and tidal energy
- geothermal energy and wind energy

tidal energy and hydropower