Given that the balloon is negatively charged and it is touching a wooden wall, the ballon will perform all the actions given in the answer choices.
A negatively charged balloon will pull positive charge on the wall surface towards it, since opposite charges attract each other.
Also, the negatively charged balloon touching a wooden wall will push any negative charge in the wall away from it. This is because like charges repel each other.
The negatively charged balloon also polarizes the molecules on the wall. This is because in molecules, atoms are bonded together since protons in one atom attract the electrons in the cloud of another atom.
Therefore, the correct choice is All of the above
ANSWER:
All of the above