Amixture requires constant shaking to keep its constituents combined. it is best described as a

If a mixture requires constant shaking to keep its constituents combined, then it is best described as a suspension. It cannot be a homogenous mixture, because that is already blended together, it doesn't need to be shaken constantly. Colloids are also homogenous, as well as a solution. But for a suspension to be homogenous, it needs constant shaking, which is why this is the correct answer.