Step 1 :The given equation is demonstrating the property that changing the grouping of the numbers does not change the sum. This is known as the Associative Property of Addition.
Step 2 :The Commutative Property of Addition would involve changing the order of the numbers, not the grouping, and the Distributive Property involves multiplication over addition or subtraction.
Step 3 :Therefore, the correct answer is the Associative Property of Addition.
Step 4 :The property illustrated is the \(\boxed{\text{Associative Property of Addition}}\).