Answer :
The criteria responsible for deciding whether a heterogeneous mixture is a colloid or a suspension is whether the particles remain suspended for an extended period of time. https://brainly.com/question/1686293
Answer: It can be differentiated on the basis of their size.
Explanation:
Colloid is defined as the solution in which the particle size is between 2 to 1000 nm. It looks like a homogeneous mixture but actually it is a heterogeneous mixture. Its particles are in continuous motion. For Example: Milk
Suspension is defined as the solution in which the particle size is greater than 1000 nm. It is considered as a heterogeneous mixture. Its particles settle down after some time. For Example: Sand in Water.
Hence, these two can be differentiated on the basis of their size.