WE ALL KNOW THT WHEN TWO DIFFERENT POINTS KEPT AT DIFFERENT POTENTIAL ARE CONNECTED BY A WIRE, POSITIVE CHARGE STARTS FLOWING FROM LOWER POTENTIAL TO HIGHER POTENTIAL THEREBY INCREASING THE POTENTIAL OF OTHER BODY UNTILL THE POTENTIAL OF BOTH THE POINTS BECOME EQUAL.NOW POTENTIAL OF EARTH IS ALWAYS TAKEN AS ZERO( ACTUALLY A REFERENCE POTENTIAL, ITS NOT ACTUALLY ZERO). NOW WHEN U CONNECT A +VELY CHARGED BODY TO EARTH, THEN POSITIVE CGARGE FLOWS FROM BODY TO EARTH AS THE RULE SAYS.BUT WE ALL KNOW THT THERE IS NOTHING LIKE FLOW OF POSITIVE CHARGE.ACTUALLY ELECTRONS FLOW FROM EARTH TO CHARGED BODY THEREBY REDUCING ITS POTENTIAL UNTILL ITS POTENTIAL BECOMES ZERO(EQUAL TO POTENTIAL OF EARTH).THTS WHY WE ALWAYS TAKE THE POTENTIAL OF AN EARTHED BODY TO BE ZERO. THST IS WHT HAPPENS IN EARTHING. PLZ.. RATE IF SATISFIED WITH THE ANSWER