They harness wind energy and convert this to mechanical energy to grid flower or pump water or to drive a generator to make electricity.
They produce mechanical energy which then creates electricity
Simple Answer to Your Question is "YES". Biomass is an alternative energy type. Basically biomass means we produce energy from materials like wood, grains or something similar. All these absorbs energy from sun and then stores some parts of them within them. Once you use them, they will grow again.
There are different types of energy that are considered "alternative". The details depend on the type of energy.
fossil energy alternative energy nuclear power
kinetic energy
Geothermal energy is one of the many forms of alternative energy that come from renewable resources. This type of energy is gathered through heat collectors in the ground and then processed to produce many things including heating and electricity.
Thermal energy
mechanical energy to sound energy
geothermal energy and solar energy
light energy
combustion energy
water energy