Aeration is the process of introducing air into a substance, often used in gardening and landscaping. In soil, aeration helps improve drainage and allows roots to access oxygen, which is essential for plant growth. This can be done using tools like a garden fork or a core aerator, which create small holes in the ground. In water bodies, aeration helps increase oxygen levels, benefiting aquatic life. It can be achieved through methods like bubbling air through water or using a waterfall feature. Proper aeration in both soil and water promotes healthier ecosystems and enhances overall growth and vitality.