Another name for the natural numbers is THE COUNTING NUMBERS.
As we know that the natural numbers are the numbers which are used for counting and hence they are known as the counting numbers.
They are given as follows:
{1,2,3,.......}
These are known as counting numbers because they could be used for counting the number of elements or could be used for ordering purpose.
They are also known as a set of positive integers.
Hence, the correct answer is:
{ the counting numbers}
( whereas the whole numbers are the set of all the counting numbers including 0 )
