Limbs Issue (well maybe not a limbs issue but an issue)

I have an issue in blender where i group all the parts together but it still only moves a couple of those parts. I need help.


Please respond ASAP.
Thank you

Grouping items doesn’t mean they will move all together. They need to be One Object or Parented or Skinned to an Armature. To make them one object, Select all items and Ctrl+J.