Can someone figure this out for me? I've been stuck on this for hours

Which of the following is true of photosynthesis? a)carbon dioxide is a reactant b)water is a product c)most reactions within this process are exothermic d)oxygen is a reactant

What role do traits play in affecting an organisms ability to reproduce? finches

Which conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass