The phrase "is contained in" refers to the relationship between two entities, where one entity is a part or element of another on a physical, conceptual, or abstract level. It implies that the first entity is encompassed, enclosed, or existing within the boundaries or parameters of the second entity.
In a physical sense, "is contained in" often relates to objects, substances, or elements that are physically enclosed or encompassed by another larger object or container. For instance, in a box of assorted chocolates, each individual chocolate is contained in the overall box. Similarly, a glass of water can be said to contain ice cubes, as the ice cubes are physically enclosed within the boundaries of the glass.
Conceptually, "is contained in" can refer to ideas, concepts, or theories that are encompassed or expressed within a larger framework or theory. For instance, one could say that the concept of natural selection is contained within the broader theory of evolution. In this case, the concept of natural selection forms a vital part of the overarching theory of evolution.
Lastly, "is contained in" can describe an abstract relationship, such as in mathematical or statistical contexts. In mathematics, one could say that a smaller set or subset is contained within a larger set. For example, the set of even numbers is contained in the set of whole numbers. This relationship implies that every element of the smaller set is also an element of the larger set.
