The summary of this chapter is the whole means to your understanding.
Hence the summary is as follows:
Kushwant is author of this chapter and dictating his life that he spend with his grandmother. He tells that his grandmother was not pretty but beautiful, after sawing her no one can say she was married because of her old age but she has maintained her lifestyle and beauty for 5 years constantly that was amazing for Kushwant. Kushwant was studying in school situated in the village that was attached to Temple(Early Time) there he was taught about gods and spirits after the school Kushwant and his grandmother threw Chappaties to the road side dogs. After the settlement of Kushwant mother and father in the city Kushwant and his grandmother was transferred to city which was the turning point in the relationship of author and his grandmother because Kushwant went to modern school or English school via School bus. Grandmother can't further help in his studies because there was no teaching of gods or spiritual spirits but he was taught of Newton's law, Rutherford model, Gravity, etc. Grandmother felt alone but one thing that was her favorite of all the time was to feed the sparrows in the balcony. After that when author went for 5 years for studying outside the country author taught that it was the last meeting with grandmother but after arrival of author he was surprised to know that grandmother was still alive by which they organized a party of the back of the warrior of the family. But the next day she felt ill but doctor said that it was seasonal fever but grandmother knew that it was it last stglage so he lay down on the bed and start saying to her beads of roasary till her roasary felt from her lifeless fingures. On the last rites of the grandmother thousands of sparrows sat spreadly in front of the deadth body of the grandmother and when Kushwant's mother threw breads crumbs they take no notice to read crumbs and flew when grandmother body was taken for last rite.