Math 6

Question Analysis
This question tests the understanding of the closure property of natural numbers.

Key Concept Explanation
The closure property states that the sum of two natural numbers is always a natural number.

Step-by-step Solution
1. Identify the correct statement: The sum of two natural numbers is always a natural number.
2. Check that the other options: 
B: Incorrect. Subtraction is not closed. Example: 5 − 3 = 2 (natural), but 3 − 5 = −2 (not natural).
C: Incorrect. Products of natural numbers are always natural. Example: 2 × 4...