The ability of a solvent to dissolve a given solute?

Which of the following is an oxidation-reduction reaction? (pictured below)

Explain two reasons you think it is important for scientists to search for new ways to treat cancer

Biomass can be used to generate electricity. biomass relies heavily on agricultural crops. plants release carbon dioxide and water in combustion. plants use photosynthesis to originally generate the energy that is needed. the chemical energy of these plants all started with what energy source?