Which of the following is considered a homogeneous mixture?

A homogeneous mixture is characterized by a consistent composition throughout, meaning that its components are evenly distributed and cannot be easily distinguished from one another. Sugar dissolved in water is an ideal example of a homogeneous mixture because when sugar dissolves, it integrates uniformly with the water. The resulting solution appears the same throughout, with no visible separation of the sugar and water.

In contrast, oil and water do not form a homogeneous mixture, as they remain separate due to differences in density and molecular structure. Sand and salt, when mixed, create a heterogeneous mixture because the individual grains of sand and salt can still be seen and separated. Iron filings and sulfur also create a heterogeneous mixture, as their physical properties remain distinct, and they can be easily separated from one another.