Which process are the guard cells associated with?

Explain: transpiration is an 'avoidable' event.

In tall plants,the transport of water occurs through . . . . . . .

Do different species of plants growing in the same area show the same rate of transpiration at a particular time? Justify your answer.

Given below are two statements:
Statement $I$: The forces generated by transpiration can lift a xylem-sized column of water over $130 \text{ meters}$ in height.
Statement $II$: Transpiration cools leaf surfaces,sometimes by $10$ to $15$ degrees,through evaporative cooling.
In the light of the above statements,choose the most appropriate answer from the options given below:

Which of the following leaves would dry up last?