Look carefully at the model. during a drought, there is less water available for the plants. there is less runoff and less infiltration. during a drought, less water is returned to the atmosphere by the plants through and there is a decrease in the plants' rate of a) respiration; photosynthesis b) photosynthesis; condensation c) transpiration; photosynthesis d) photosynthesis; transpiration

Option (C) is the correct answer.

Explanation:

A process in which plants absorb water with the help of roots and through the pores in leaves, plants give off water vapor. This process is known as transpiration.

Thus, we can conclude that during a drought, less water is returned to the atmosphere by the plants through transpiration, and there is a decrease in the plants' rate of photosynthesis.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.