Final answer:
The equation 4+0=4 shows the Additive Identity Property, indicating that adding zero to any number gives back the original number.
Step-by-step explanation:
The equation 4+0=4 illustrates the Additive Identity Property. This property states that any number plus zero equals the original number. In other words, the number zero is the identity for addition, which means it does not change the value of the other number it is added to.