What is Riis’s complaint about the education received by tenement children?

In the winter of 1892, Riis visited eleven of the city’s sixteen riverside dumps to investigate the enforcement of two public health laws: one required that old rags be washed before resale, and the other forbade rag pickers from living in the dumps. He learned that neither law was enforced. Riis interviewed the rag pickers and took seven photographs, five of which were reproduced as line engravings in the Evening Sun. Riis saw women and children working and living in the dumps. He wrote: “I found boys who ought to have been at school, picking bones and sorting rags. They said that they slept there, and as the men did, why should they not? It was their home. They were children of the dump, literally.”

Explanation:

i looked it up and this is what is said