Option D 
Answers: 
In the given identities a + 0 = 0 + a will represent the additive identity. 
 Solution: 
The additive identity says that if you add a real number to zero or add zero to a real number, then you get the same real number back. This can be written as,
 A + 0 = A
The number zero is known as identity element or the additive identity. 
Let us understand the additive property using a example: 
Let us consider the case 0 + 40 = 40, here 0 represents the identity value. 
When we add zero to real number 40, we get the result as 40 which is the same number. 
Hence, on the given options, the value a + 0 = a will represent the additive identity.