Transpiration is mainly a process of

Under what conditions does the rate of transpiration increase?

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:

Increase in temperature and velocity of wind cause an increase in transpiration initially but later it slows down,because

Majority of potometers measure the rate at which water is:

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