When leaves transpire the water potential of mesophyll cells is:

Explanation

The correct answer is "Decreased." When leaves transpire, they lose water vapor, which decreases the water potential of the mesophyll cells. This decrease creates a negative water potential gradient that draws water from the xylem into the mesophyll cells to replace the lost water. The other options are incorrect because they either misinterpret the effect of transpiration on water potential or describe processes not directly related to the primary impact of transpiration.