Explanation:

Toto was in the captivity of a tonga owner. The grandfather gets sympathetic with the monkey and thinks that his private zoo would be a better place for Toto. So he purchased Toto from the tongawallah for five rupees.

Answer:

Grandfather loved animals . one day he saw his attractive monkey with a tonga driver . The monkey was tied to a feeding through and seemed out of place there .Grandfather had great liking for animals .so he decided to buy toto from the tonga -—driver and bought it for five rupees