The Commutative Property of Addition states that changing the order of the numbers being added does not change the sum.
The correct expression that demonstrates this property from the options given is:
6 + 4 + 5 = 4 + 6 + 5
This expression shows that the order of the addends (6, 4, and 5) can be changed without affecting the sum, making it an example of the Commutative Property of Addition.