Why am I skinny but not showing six-pack abs?

Will I get visible six-pack abs if I do push-ups every day?

Why can I feel my six-pack abs but not see them?

What does 18% body fat look like on a male?

What does 14% body fat look like on a man?

Will I get visible six-pack abs if I eat less?

Will I lose weight and get visible six-pack abs by running four times a week?

Will I lose weight and get visible six-pack abs by exercising four times a week?

What does 19% body fat look like on a female?

Will I get visible six-pack abs if I do a 1-minute plank every day for a month?