which best describes a mixture?\nit has a single composition, and it has a set of characteristics that does…

which best describes a mixture?\nit has a single composition, and it has a set of characteristics that does not change.\nit can have different compositions, but it has a set of characteristics that does not change.\nit has a single composition, but it has a set of characteristics that does change.\nit can have different compositions, and it has a set of characteristics that does change.
Answer
Brief Explanations:
A mixture is composed of two or more substances physically combined. Its composition can vary, and as a result, its characteristics such as density, melting - point etc. can also change depending on the proportion of its components.
Answer:
It can have different compositions, and it has a set of characteristics that does change.