Question

a combination of sand, salt,and water is a

Answer 1

A combination of salt and water is a homogenous mixture as composition of salt is uniformly distributed through out the mixture forming only one phase.

When we add sand to the mixture of salt and water, sand doesn't dissolve in the mixture and settles down after a while.

The mixture of the three can be separated by pouring into another container and sand can be separated from a mixture of salt and water.

So the solution of salt sand and water is a heterogenous mixture