If you mix salt, sand and sugar with water in a small jar, will the resulting mixture be a suspension , a solution, or both

It will be both. It would be that answer because the sugar and salt will dissolve forming a solution, and the sugar will be a suspension and I think that the reaction will not be immpressive because when you mix water and salt it will be a weak acid and when you mix sugar and water it will concentrate at the end of the substance.

It is used to during sexual reproduction between humans

Ha ha it happens bro