Question

how many kinds of alternative energy sources are there and can you plz tell me the names and what they do

Answer 1

Kinds of Alternative Energy Sources : 

i.Solar Energy : Solar energy is the energy from the sun that is converted into                                 thermal or electrical energy.They are used 
ii.Wind Energy : Wind energy is used to to generate electricity using wind power                             and it is also a form of solar energy.
iii.Geothermal Energy : It is the heat from beneath the earth.It is used to make                                             electricity through steams from beneath the earth by                                                 geothermal power plants.
iv.Hydroelectric Energy : When water flows it creates energy that can be caught                                            and turned into electricity.
v.Biomass Energy : It is derived from organic matter or living organisms to use                                     as a source of energy.
vi.Ocean Energy : When water moves in oceans it creates energy in move                                           (kinetic energy) this can be tackled to convert into electricity.
vii.Hydrogen Energy : It can be extracted from water.

Hope this helps :)

Answer 2

One source is solar radiation used by plants and other photoautotrophes to produce food
chemical energy is used by chemoautotrophes and also all living organisms in metabolism