Zero belongs to the following sets of real numbers:
- Whole numbers (0, 1, 2, 3, ...),
- Integers (..., -2, -1, 0, 1, 2, ...),
- Rational numbers (any number that can be expressed as a fraction, and 0 can be expressed as 0/1).
Therefore, the correct response is:
whole numbers, integers, and rational numbers.