Answer is physical change
Step-by-step explanation
Since there are no answer choices I assume you are looking for physical or chemical change occurs in a mixture.
A mixture is created when two or more different substances are physically combined and have no chemical reaction and can be separated back into its original substances.
Example is oil and water or salt and water.
A chemical reaction occurs when two or more substances are combined to form a new substance and cannot be separated back into its original substances.