Answer:
A) air
Step-by-step explanation:
What is a mixture?
- A mixture is a combination of two or more elements that have not chemically combined with one another. Each element in the mixture still has its own properties.
- Examples: Air; air is made of nitrogen, oxygen, CO2, and more, but they haven't chemically combined
What is a compound?
- A compound is a substance that is made by two or more elements chemically combining with one another.