The descriptive language is use to bring a scene, a picture a smell a feeling, the idea is to connect the reader to what the author want to transmit to make her/him feel the same way or visualize the same, in this case the option “It was a new building, painted yellow, with a shingled roof that was not like the red tile of the school in Mazatlan” evoke in the reader the picture of the building that is being describe.