Who was the author of the poem london and other romantic protests against the effects of industrial urban life on children and the poor?

The correct answer is William Blake.

Blake can be characterized as "idiosyncratic," that is, he had several unique and distinct pieces of writing, making it difficult to classify them into one specific movement. However, his works are often categorized in the Romantic Movement, which portrays individualism, emotion, nature, and nostalgia for the past.