Explanation

Every real number is either a rational or irrational number: True. A real number can either be expressed as a fraction (rational) or cannot (irrational).

Every whole number is a natural number: False. Whole numbers include 0, but natural numbers start from 1. Therefore, 0 is a whole number but not a natural number.

All natural numbers are integers: True. Natural numbers are a subset of integers.

All integers are rational numbers: True. Every integer can be written as a fraction (e.g., 

5 = 5/1), so all integers are rational.