Why does either heat, light, or wind effect the rate of transpiration the most?

Depends on which one is greater in extent. Heat and wind cause evaporation of water vapor from the stomata, which causes the movement of water to continually be absorbed from the roots.

Light affects the rate of photosynthesis, which as you know has the equation:

water + CO2 --> glucose + oxygen.

Therefore water is used up in this process and also causes the plant to take up water through transpiration pull.

These factors affect transpiration the most as they affect the concentration of water in the leaves directly.

When there is no wind the air will be full of water "saturated" so no more water can evaporate and 'enter' the air. So no water is lost. On the other hand if there is wind the air that is filled with water will be blown away, so the air that is now there would not be full "unsaturated". Because it is not full water can now 'enter' the air because there is space. If this keeps on happening a lot of water will evaporate(transpire) and this will increase the rate of transpiration( amount of transpiration. I hope you understand it and its useful, I've said it as simply as i can.