Faustus's downfall is marked by A. his increasingly dangerous use of the black arts.
He sold his soul to the devil in order to gain all the knowledge in this world. He didn't want glory or riches, he only wanted to know absolutely everything there was to know in the world. The more he knew, the more he wanted, which is what led to his downfall.
An animal lacking a backbone, such as an arthropod, mollusk, annelid, coelenterate, etc. The invertebrates constitute an artificial division of the animal kingdom, comprising 95 percent of animal species and about 30 different phyla.
