Final answer:
The expression 1.9+0=9 demonstrates the additive identity property, where the addition of zero to any number results in the original number.The correct answer is option is a)
Step-by-step explanation:
The expression 1.9+0=9 illustrates the additive identity property. The additive identity property states that when you add zero, the additive identity element, to any number, the result is the original number itself. This property is fundamental in mathematics and applies to the addition of ordinary numbers, vectors, and other mathematical entities. There is no change to the original value when zero is added, hence the term 'identity'.