I still find it a bit hard to believe comparing the heights of your other family members but whatever.
There is no best cardio exercise to loose fat, they all work if you keep your heart rate up. You could jog, skip rope, cylcing etc... the goal here is to keep your heart rate at a certain percentage and the right diet along with some supplement for that extra edge. There is really too much information for me to type, you best do the research yourself. Go to bodybuilding.com and read the articles.