Option 1: Transpiration. Transpiration is the process by which water is lost from a plant in the form of water vapor through the stomata on the leaves. It helps in the transportation of water and minerals from the roots to the rest of the plant, and also helps in cooling the plant.

Option 2: Guttation. Guttation is the process by which excess water is released from the tips or edges of leaves in the form of droplets. This usually occurs during the night or early morning when the soil is moist and the root pressure is high. Guttation is different from transpiration as it involves the release of liquid water, whereas transpiration involves the release of water vapor.

Option 3: Secretion. Secretion is the process by which specific substances are produced and released by cells or glands. It is not involved in the elimination of excess water in the form of droplets from a plant.

Option 4: Excretion. Excretion is the process by which waste products are eliminated from the body of an organism. It is not related to the elimination of excess water from a plant.

Therefore, the correct answer is option 2: Guttation, as it is the physiological process where excess water escapes in the form of dro