This is called energy

Sir – define energy??
.
.
.
.
.
.
Santa – sir pura to nhi ata but last ka pata hai bas.
.
.
.
.
.
.
SIR – thik hain,jitna ata ha utna bolo.
.
.
.
.
.
.
Santa “. . . . . This is called energy”