Hint: First understand the difference between natural and whole numbers and later list out all whole numbers which starts from zero to find the smallest whole number.
Complete step by step answer:
As we know that the whole numbers are 0,1,2,3,4,5,6,7......
Clearly, the smallest whole number is 0.
Note - In this particular question, we should be aware that whole numbers starts with 0 and natural numbers start with 1 i.e. 0 is not included in the series of natural numbers.