Following expelling the air, what is the next step?

• A. Tie it into a knot
• B. Seal the bag
• C. Place in top metal box
• D. Dispose in regular trash

Answer: (A)

After expelling the air, tying the bag into a knot creates a secure, reliable closure that prevents air from re-entering and contents from spilling or shifting. This simple closure uses the bag itself, needs no extra materials, and stays shut during handling and transport. It’s quick, effective containment, which is why it’s the best next step. Sealing with tape or relying on any other closure can fail if the seal loosens, and placing the bag in a metal box or disposing of it would skip the essential containment step before any further action.