In ' Salute to the Elephant the line 'The elephant's head is his burden which he balances' suggests that

the elephant's head is so big that it does not allow the animal to move elegantly

the elephant's head is so big that it makes the animal look clumsy

the elephant's head is so big that it prevents the animal from moving from one part of the forest to the other

the elephant's head is like a big instrument for weighing