We can mathematically represent natural numbers using the following

All the above

Explanation

Statement Form

N = Set of all numbers starting from 1.

Roaster Form

N = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ………………………………}

Set Builder Form

N = {x : x is an integer starting from 1}

[] are not used to represent an infinite set of numbers