Match the energy source in column 1 to its characteristic in column 2. a. hydrogens not renewable b. solar power harnesses the energy of the sun directly c. natural gas uses a fuel cell d. hydroelectricity can only operate near rivers

A. Hydrogenuses a fuel cell
b. Solar powerharnesses the energy of the sun directly
c. Natural gas---not renewable 
d. Hydroelectricitycan only operate near rivers 

Solar power harnesses energy from the sun via photo-voltaic cells. Natural gas is a non-renewable resource because it takes millions of years to create the resource and if it is used up will take millions of years before it is replenished. Hydroelectricity harnesses the power of water to turn turbines to generate electricity.

May consider a group  g=({0,1},+)g=({0,1},+)where  ++  will work as the xor operator like we work in boolean algebra. note here, that ‘00’ and ‘11’ are not the usual 0 and 1 that we work with everyday. the elements are  called  ‘00’ and ‘11’ and  may not mean  zero (nothing) and one (single). ‘00’ is the identity for the given binary operator +, meaning that any element operated with ‘00’ gets us that element itself.  for a set  ss  in  g′g′  having more elements than just  {0,1}{0,1}  the values for  a+b∈sa+b∈s, such that  a∈s,b∈sa∈s,b∈s, have to be first defined, only then can you determine the value of  1+11+1. the answer could possibly have been  22  if oanswer is25,000