Zero belongs to the following sets of real numbers:
- Whole numbers (0, 1, 2, 3, ...)
- Integers (..., -2, -1, 0, 1, 2, ...)
- Rational numbers (numbers that can be expressed as a fraction of two integers, where the denominator is not zero; 0 can be expressed as 0/1)
Therefore, the correct response is:
whole numbers, integers, and rational numbers.