There are choices for this question namely:
A. used to keep cells turgid
B. lost during transpiration
C. used as a solvent
D. used as a hydrogen source in photosynthesis
E. converted to carbon dioxide
The correct answer is "lost during transpiration". Transpiration is similar to evaporation of water but different such that in transpiration, water moves from the parts of the plant that are sun-exposed such as the leaves and flowers and allows the water to be evaporated. Only small amounts of water is needed by plants for photosynthesis.