Final answer:
GLUE is a heterogeneous mixture composed of different substances that do not uniformly mix. The other options represent homogeneous mixtures.
Step-by-step explanation:
A heterogeneous mixture is a mixture that consists of different substances that are not uniformly distributed throughout the mixture. Out of the given options, GLUE is an example of a heterogeneous mixture as it is composed of various substances that do not mix evenly such as water, polymers, solvents, and additives. In contrast, options A, C, B, and D represent homogeneous mixtures, which are mixtures that have uniform and consistent compositions throughout.
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