Transpiration and Photosynthesis - a compromise. Give explanation.

(N/A) $\Rightarrow$ Transpiration serves multiple essential purposes in plants.
$\Rightarrow$ It creates a transpiration pull,which is necessary for the absorption and transport of water and minerals from roots to leaves.
$\Rightarrow$ It provides the water required for the process of photosynthesis.
$\Rightarrow$ It cools the leaf surfaces,often by $10$ to $15$ $^{\circ}C$,through evaporative cooling.
$\Rightarrow$ It maintains the shape and structure of plants by keeping cells turgid.
$\Rightarrow$ Photosynthesis and water availability: An actively photosynthesizing plant has a high demand for water. Since photosynthesis is limited by available water,which can be rapidly depleted by transpiration,there is a constant conflict between the two processes.
$\Rightarrow$ The humidity of rainforests is largely maintained by the continuous cycling of water from the soil to the roots,through the plant,and into the atmosphere.
$\Rightarrow$ The evolution of the $C_{4}$ photosynthetic pathway is a strategic adaptation to maximize $CO_{2}$ fixation while minimizing water loss.
$\Rightarrow$ $C_{4}$ plants are twice as efficient as $C_{3}$ plants in fixing carbon.
$\Rightarrow$ Notably,a $C_{4}$ plant loses only half as much water as a $C_{3}$ plant to fix the same amount of $CO_{2}$.