Let's analyze each statement: (a) because the tree blocks direct sunlight: TRUE. Blocking direct solar radiation significantly reduces the heat load on the person and the ground, making the shade feel cooler. (b) because heat from the air is used in evaporation of water by tree leaves reducing the temperature: TRUE. Trees undergo transpiration, where water evaporates from their leaves. This evaporation is an endothermic process, absorbing latent heat from the leaves and the surrounding air, leading to a cooling effect. (c) because photosynthesis by tree leaves absorbs energy from sunlight: Partially true, photosynthesis does absorb light energy, but the amount of energy absorbed for photosynthesis is relatively small compared to the total solar radiation, and this absorbed energy is converted into chemical energy (sugars), not dissipated as a cooling effect on the environment. The primary way trees dissipate excess heat absorbed from sunlight is through transpiration. (d) because tree leaves absorb water vapour from air which is an endothermic process: FALSE. Trees release water vapor into the air through transpiration. While plants can absorb some atmospheric moisture, it's not a primary cooling mechanism, and absorbing water vapor (condensation) is an exothermic process, releasing heat.