Final answer:
The property illustrated by the equation (x + y) + z = z + (x + y) is the Associative Property of Addition.
Step-by-step explanation:
The property illustrated by the equation (x + y) + z = z + (x + y) is the Associative Property of Addition. This property states that the grouping of numbers being added does not affect the sum. In other words, when adding multiple numbers, you can change the grouping of the numbers and still get the same result.
For example, if we have the equation (2 + 3) + 4, we can use the associative property to rearrange the parentheses as 2 + (3 + 4). Both expressions will give us a sum of 9.
The answer is: c) Associative Property of Addition.