Transpiration is the process through which excess water is removed from the plant. It is the evaporation of water from plant leaves and stems through small pores called stomata. This process is essential for the survival of the plant as it helps in regulating the water content and temperature of the plant.

Factors affecting transpiration rate:
The rate of transpiration is affected by various factors such as:

1. Temperature: As the temperature increases, the rate of transpiration also increases.

2. Humidity: High humidity reduces the rate of transpiration as the air around the plant is already saturated with water vapor.

3. Wind: Increased wind speeds increase the rate of transpiration by removing the water vapor from around the plant.

4. Light: Plants transpire more in the presence of light as it triggers the opening of stomata.

Importance of transpiration:
Transpiration plays a crucial role in the growth and development of plants. It helps in the following ways:

1. Water absorption: Transpiration creates a suction force that helps in the absorption of water and minerals from the soil.

2. Cooling effect: Transpiration helps in cooling the plant as the evaporation of water from the leaves and stems releases heat.

3. Transport of nutrients: Transpiration helps in the transportation of nutrients and minerals from the roots to the leaves.

Conclusion:
In conclusion, transpiration is the process through which excess water is removed from the plant. It is essential for the survival of the plant as it helps in regulating the water content and temperature of the plant. Factors such as temperature, humidity, wind, and light affect the rate of transpiration.

Because during transportation water will change it into water vapour and it evaporate so obviously it get rid of excess water