This is a small plant that develops naturally from a parent plant, and grows alongside it. If removed, it can grow separately as a new plant.
An orchard is a garden or area where fruit trees are grown.
This is a something that has come from either an animal or a plant, and breaks down and gives nutrients to plants if applied to soil. Compost is a good example of organic matter.
These are plants that live underwater and release oxygen into the water around them, for example water violet.