Bamboo, seedlings and trees are all plants, but they are not the same. These plants are grown or planted in the ground, and they are not of the same species as those in the ground. They have life, but the fields have no life, so they belong to inorganic things.
Classification of things
One is manual classification, which classifies things according to their external characteristics. For convenience, people classify all kinds of goods, display them at different counters and sell them in different stores. This classification method can be called external classification.
Another classification method is to classify things according to their essential characteristics. A whale living in the ocean is like a fish, but it doesn't belong to a fish. It is a viviparous mammal. It has no scales on its body, breathes with its lungs and has no gills. It has the characteristics of a mammal.