The correct option is A To capture high electric sparks and moving them to ground to minimise its effect
Earthing is the process of transferring the immediate discharge of electricity directly to the earth plate, by means of low resistance electrical cables or wires. In case of a short circuit due to leakages arising from weak insulation or damage, the earthing wire safely removes excess electricity and passes it on to the ground. Safety to persons operating high power electrical systems is ensured by earthing.