2 seems like the best answer
The liver is at a #3 level of organization, an organ..which has a specific job to do in the body.
I believe that B is the answer. There are actually multiple disadvantages to using solar energy including the lack of reliablility, the amount of resources needing to be used to create solar panels, and even the lack of energy when there is no sun.
The reduced dependence on fossil fuels is an advantage and the same is involved when it comes to choice C. It is also important for it to become a renewable source so there isn't a lack of needed resources.
Definitely Matter notes.. Matter is made up of any and almost everything.! It cannot be changed or destroyed, is gas, solid or liquid and is made up of atoms (isotones)
