Math 6

Question Analysis
This question assesses the ability to identify a set of natural numbers by excluding non-natural numbers (negatives, zero, decimals).

Key Concept Explanation
Natural numbers are positive integers ≥1.
Sets containing zero, negatives, or non-integers are incorrect.

Step-by-Step Solution
Option A: All elements (2, 4, 6, 8) are positive integers, so it’s correct.
Option B: Includes -1 (negative) and 0 (not natural).
Option C: Includes 0 (not natural).
Option D: Includes 1.5 (decimal, not integer).