When we are walking in a garden or in a forest, we should try hard to be gentle and not hurt the plants or animals living around us. This is called "treading lightly". It's like being a good guest in someone's home, we don't want to disturb or break anything. If we step heavily or carelessly, we might crush flowers, small creatures or disturb the earth which can damage the environment. By being gentle and being careful, we can help protect the plants and animals around us so that they can continue living happily. So always remember to tread lightly when you are in nature!