The djinn helped the three animals by making the camel realized that he should work too. At first the camel was not working but when he got a hump he immediately realized and started to do his work.

The story "How the Camel Got His Hump" from the NCERT textbook tells us about how a djinn helped three animals - the horse, the dog, and the ox. Let's delve into the details of their interactions and the ways in which the djinn assisted them.

1. The Horse:
In the story, the horse was always ready to work and carry the man on his back. However, one day, the djinn found the horse resting lazily under a tree instead of doing his duties. The horse made excuses, saying that he was too tired to work. The djinn warned the horse that if he continued being lazy, he would give him a hump. The horse ignored the warning, and the djinn fulfilled his promise by giving the horse a hump on his back. From that day on, horses have had humps.

2. The Dog:
Similar to the horse, the dog was also found lying lazily under a tree by the djinn. The dog made excuses for not doing his work and claimed that he didn't have energy. The djinn warned the dog that if he didn't work, he would give him a hump on his back. Unfazed by the warning, the dog continued to be lazy, and the djinn kept his promise by giving him a hump. Since then, dogs have had humps.

3. The Ox:
The ox was a hardworking animal, but one day the djinn found him resting instead of plowing the fields. When the djinn asked the ox why he was not working, the ox replied that he didn't have anyone to help him. The djinn then provided the ox with a hump on his back as punishment and told him that he would always have a helper in his hump. From that day forward, oxen have had humps, which help them with their work.

In all three instances, the djinn punished the animals for their laziness by giving them humps, which became a permanent physical feature. The djinn's intervention served as a lesson to the animals about the importance of hard work and diligence.