Answer:
The fur lost 5 electrons.
Step-by-step explanation:
Protons can't be moved between objects or elements. Protons are in the center of atoms, not only that but it is also used to identify what element is being used.
Electrons, however, can be moved. It can be decreased or increased. Not only that but because the rubber rod GAINED 5 elections. It is the rabbit fur that LOSES 5 electrons.