Answer:
The correct answer is - The central vacuoles present in plant cells in the loose water and can no longer provide support to the cells.
Explanation:
The droop in the plants take place when plants do not get enough water, leaves of the plant start to droop or wilt. The droop cause curls the leaves and turns yellow.
This is the mechanism of the plant to defense so it can remove some parts and decrease the water loss to the atmosphere. Wilting is caused due to the central vacuoles lose the water and lose their property to help in support the plant cell.
Thus, the correct answer is - The central vacuoles present in plant cells in the loose water and can no longer provide support to the cells.