Iam a liquid if you mix me with water i float on top but if you mix me with gasoline i sink what am i .? options air alcohol aluminum cork cornsyrup diamond gasoline glycerin gold ice iron lead marble mercury rubber silver steel water

Corn syrup seems to be the best answer, as most of the rest of the options are either metals or things that sink in water. (minus cork and ice but we don't talk about them because they float in both)

Explanation:

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.