Final answer:
Salt dissolved in water is an example of a homogeneous mixture because it has a uniform composition throughout and its components are not individually distinguishable (Option B).
Step-by-step explanation:
An example of a homogeneous mixture is salt (NaCl) dissolved in water (H₂O). In a homogeneous mixture, the mixture has a uniform composition throughout, and the various components are not visually distinct. Salt water is a classic example of a homogeneous mixture because once the salt is fully dissolved, it is evenly distributed throughout the water, creating a solution where every part has the same ratio of salt to water.
Comparatively, a heterogeneous mixture contains substances that remain physically separate, and their individual components can be observed. Therefore, the answer to the question is (b) salt dissolved in water, as it represents a homogeneous mixture where the salt is no longer visible and is uniformly distributed.
Thus, the correct option is B.