Which of these is the BIGGEST cause of OBESITY?

My personal opinion is poor eating habits, not exercise. If people ate properly, there would be less obesity, even if people didn't exercise.. People eat crap and far too much of it. We live in a society where food is plentiful. Unfortunately, a lot of this plentiful food is fast food. Face it, you can't go 5 miles in the US without running into some form of fast food establishment. So, it's a combination of poor quality food being consumed and excessive quantity. We were raised, at least most of us were, to clean our plates because there are starving children in the world. So, we do so with gusto. We go to restaurants, get high fat appetizers, main courses and follow it with desert.