Natural numbers are the positive integers
No decimals or fractions
No negative numbers
No zero
The given set is
[tex]\mleft\lbrace-4,0,-\frac{2}{3},4.11111,2,\pi,\sqrt[]{6}\mright\rbrace[/tex]We will neglect all decimal, fraction, negative, roots, or 0 from the set of numbers, then
The only natural number is 2
The answer is 2