We don't automatically have visible abs. If someone is skinny then just has less fat, the only thing left to do is work the muscles out.
Yeah but in general people nowadays have to much body fat for abs to be visible
- Find out how much calories you need
- Figure out how much you actually consume (that’s the difficult part)
- Make sure you’re in a deficit
- Give your body some time to actually lose the weight
- Go for long walks or do some jogging/tennis/football whatever
- And train abs (but if you train your body there’s no reason why you should ignore abs anyway right)