The true statement about the relationships between the number sets is:
Whole numbers include all natural numbers and 0.
Here's a brief explanation of the other statements:
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Not all natural numbers are real numbers: This is false because all natural numbers are indeed real numbers.
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All rational numbers are also integers: This is false because rational numbers include fractions like 1/2 or 3/4, which are not integers.
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Some irrational numbers are also integers: This is false because irrational numbers cannot be expressed as fractions, which means they cannot be integers.
Thus, the only true statement is regarding whole numbers.