Why is my armature deforming it's mesh in a wrong way and how can I fix it? I'm trying to get the body to move which I have done, but I notice a part of the body open up or move apart,so how can i fix this or what should I do?
ok why can i do to fix this one in the second picture
That can only be because edges are separated. Try this : go to edit mode, select all vertices and remove doubles. Probably that will fix the problem.