Aerogenerators are used to produce electricity from wind moving water the sun

Wind

Aerogenerators are generators which produce electricity by utilizing wind energy. It requires wind in high speed to work efficiently. It has a turbine which move due to the affect of wind. Mechanical rotation of blades of turbine  by the action of high speed wind results in generation of energy in the form of electricity.  

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.