What is transpiration?

In transpiration

Under what conditions the rate of transpiration increases by

What happens if rate of transpiration exceeds the rate of absorption of water?

What causes the opening and closing of guard cells of stomata during transpiration?

For plants transpiration is

A. In dry atmosphere , the relative humidity is low, so the rate of transpiration increases B. Slow breeze promotes the rate of transpiration C. ABA promotes transpiration D. A high salt concentration in soil water increases transpiration

Rate of transpiration is dependent upon