Explain how a glass rod acquires electrostatic charges when rubbed against fur?

When a glass rod is rubbed against fur, electrons are transferred from the fur to the glass rod. This transfer of electrons causes the glass rod to become negatively charged, as it now has an excess of electrons. The fur, on the other hand, becomes positively charged as it loses electrons. This transfer of electrons creates an imbalance of charges between the two materials, resulting in the glass rod acquiring electrostatic charges.