Which one of these examples shows a homogeneous mixture? oil and vinegar or salt water

A homogeneous mixture would be the salt water

chemical combination of two or more elements in definite proportions. For example, two hydrogen molecules + one oxygen molecule = one water molecule. A solution is a physical combination of two or more chemicals mixed evenly (salt that is dissolved in water). Solutions are also known as homogenous mixtures. A mechanical mixture is a physical combination of two or more chemicals that are not evenly mixed (hot fudge on ice cream).