Matter is anything that has and . 1. destiny, mass
2. volume, mass
3. volume, weight
4. destiny, weight

2

Matter is defined as anything that has mass and takes up space (it has volume).

Hydro means coming from "Water" so hydroelectric is when water is collected behind a dam. The collected water then is channeled through pipe and turns big electric turbines as the weight of water and gravity pulls the water down stream. A famous example of hydroelectrical power generation is Hoover dam in Nevada.

The answer is water.