A colloid has the particles that have the ability to scatter light called the Tyndall effect named after the scientist named Tyndall. A suspension has large suspended particles that settle out at the bottom of the container. A solution has small particles that are evenly distributed throughout. Hence the answer is choice 2.
The answer would be the last one- it separates dissolved substances.
Have a great rest of your day!
1×10^-4 = 0,0001M
pH = -log[H+]
pH = -log0,0001
pH = 4
