This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to flatten your belly incorporating small everyday changes
Talk and walk.
Instead of catching up with friends over food and drinks, suggest a reunion on the move-you're likely to work out if you have an exercise buddy. Suggest a weekly walk-and-talk session, form a friendly fitness club, or try a new class at the gym together.

Choose from: +See what supplies they have before or after you move. Balance your body weight throughout the process.; +Sculpt your core while you walk. As you go about your day, imagine there's a magnet pulling your belly button back toward your spine.; +It is important to avoid talking again about how your day went, which will only push you further towards shifting your diet and suggesting new steps for your diet. Go on road trips with only a few friends.; +Shake hands once you've been on a walk-and-talk strategy. This lessens the natural tendency for you to get on a ridiculous roll.;
The answer is:
Sculpt your core while you walk. As you go about your day, imagine there's a magnet pulling your belly button back toward your spine.