Q: Why the only way to lose the last belly fat is weight training?Why u cant lose it by cardio like the rest of the fat?I mean how this is explained.

A: Weight training (combined with the right diet) is pretty much always the superior fat loss approach compared to cardio. Getting the last bit of belly fat is just an example of that. Check out the discussion in http://www.mikesfitness.com/content/lance-armstrong-calories-metabolism and other answers referenced in there.