If the sample of matter is a pure substance, meaning made up of only one type of atom.
Answer:
E or "The dust found in the interstellar medium aggregates to form the disk."
Explanation:
Used G00GLE, and it said "One says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form."
(couldn't use the search engine's actual name)
Colloid is the mixture of red blood cells that is floting with plasma. This is in the body.
