To make salt water a heterogeneous mixture, you would have to a) add sand. b) add sugar. c) boil the water. d) remove the salt.

I believe the answer is A: Add Sand.

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.

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