The correct statement among the options provided is:
Whole numbers include all natural numbers and 0.
Here's a breakdown of why the other statements are false:
- Some irrational numbers are also integers. (False: Irrational numbers cannot be integers.)
- Not all natural numbers are real numbers. (False: All natural numbers are indeed real numbers.)
- All rational numbers are also integers. (False: While all integers are rational numbers, not all rational numbers are integers, as rational numbers can be fractions.)
Therefore, the first statement is the only true one.