What are counting numbers?

Counting numbers are defined as the set of positive whole numbers that begin from one and continue infinitely (1, 2, 3, 4, ...). This specific definition aligns with the understanding that counting numbers are used for enumeration, which inherently excludes zero and negative numbers.

The choice that identifies counting numbers as whole numbers greater than zero captures this precise meaning, affirming that counting starts at one and does not include zero or any negative values. This characteristic makes counting numbers distinct from whole numbers, which do include zero but do not start counting from it.

In contrast, definitions involving negative numbers, decimals, or whole numbers including zero either expand the set incorrectly or mischaracterize the primary purpose of counting numbers. Hence, the correct answer effectively encapsulates the essence of counting numbers as strictly the positive whole numbers.