Answer the following question given this paragraph: 

Wine, air, and gunpowder are other examples of common homogeneous mixtures ( Figure below ). Their exact compositions can vary, making them mixtures rather than pure substances. Wine is a liquid mixture of water, ethanol, and a variety of other dissolved substances. Air is a mixture of nitrogen gas (78%), oxygen gas (21%), and small amounts of various other gases. Gunpowder is a solid mixture comprised of potassium nitrate (75%), charcoal (15%) and sulfur (10%).


Q: Wine, air, and gunpowder are all examples of what kind of common mixtures?

 Choices:

- combined

- contiguous

- heterogeneous

- homogeneous

A:
homogeneous
