What is a heterogeneous mixture water b sugar c sugar-water solution d whole wheat bread?

* Heterogeneous mixtures are mixtures where the components are not evenly distributed and can be easily distinguished.

Let's analyze each option:

* a) water: Water is a pure substance, not a mixture.

* b) sugar: Sugar is also a pure substance.

* c) sugar-water solution: When sugar dissolves in water, it forms a homogeneous mixture. The sugar particles are evenly distributed throughout the water, making it difficult to distinguish them.

* d) whole wheat bread: Whole wheat bread contains various visible ingredients like flour, seeds, and grains. These components are not evenly distributed, and you can easily see the different parts of the bread.

Therefore, whole wheat bread is the only option that represents a heterogeneous mixture.