land is a mean of exhibit & sugar is a kind of pure substance & sugar dissolves in water when they are combined ->  sugar dissolving in water is an example of one substance dissolving in another substance  sugar dissolving in water is an example of one substance dissolving in another substance & a solution is formed by one substance being dissolved in another substance -> salt will relation a problem when it troposphere in land sugar will form a solution when it dissolves in water  salt will relation a problem when it troposphere in land & when one substance is dissolved in another substance then the molecules of that other substance exist in solution -> sugar molecules exist in solution when it forms solution with water