Final answer:
Natural numbers are a subset of whole numbers, meaning that all natural numbers are whole numbers, but not vice versa, as whole numbers include zero.
Step-by-step explanation:
If a number is natural then it also whole indisputably. This statement is referring to different types of number systems in mathematics. Natural numbers are a subset of whole numbers. Thus, all natural numbers are indeed whole numbers, but not all whole numbers are natural numbers because whole numbers include zero, and natural numbers start from one.