The answer is heterogeneous because if a salad is mixed by the following item it will not mix properly and we could easily separate them.
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Explanation:
A mixture in which solute particles are unevenly distributed into the solvent is known as a heterogeneous mixture.
For example, oil present in vinegar will unevenly mix together.
Whereas a mixture in which solute particles are evenly distributed into the solvent is known as a homogeneous mixture.
For example, salt dissolved in water is a homogeneous mixture.
Therefore, when a salad dressing is made by a chef by mixing oil, vinegar, and spices then it is a heterogenous mixture.
