Respuesta :
Answer: Option (A) is the correct answer.
Explanation:
A mixture in which particles are not uniformly distributed throughout the solution then it is known as a heterogeneous mixture.
For example, sand in water is a heterogeneous mixture.
Whereas a mixture in which particles are evenly distributed throughout the solution then it is known as a homogeneous solution.
For example, salt in water is a homogeneous solution.
Thus, we can conclude that to make salt water a heterogeneous mixture, you would have to add sand.