Final answer:
A definite, homogeneous chemical composition indicates that a substance has a uniform and consistent arrangement of its components, either as a pure substance with a consistent ratio of atoms or as a homogeneous mixture with even distribution of substances.
Step-by-step explanation:
A definite, homogeneous chemical composition refers to a substance that has a uniform distribution of its components throughout. This can either be a pure substance or a homogeneous mixture. A pure substance includes elements, which consist of one type of atom and cannot be broken down by chemical means, and compounds that are made up of two or more types of atoms in a fixed ratio. A homogeneous mixture has the same composition from point to point as its constituent substances are evenly distributed throughout the mixture.
Answer choice (B) Consistent arrangement of atoms in a compound is the option that best describes a definite, homogeneous chemical composition. Pure substances or homogeneous mixtures have consistent properties, unlike heterogeneous mixtures where the distribution of substances can vary from one region to another.