What does it mean when someone asks if an argument is valid?

Tom’s testimony has the effect of making scout feel sympathetic towards both tom and mayella. explain why she is sympathetic towards each of them.

Why do people live together and form societies

Select the correct answer from each drop-down menu. read the following excerpt from the novel "oliver twist" by charles dickens. although oliver had been brought up by philosophers, he was not theoretically acquainted with the beautiful axiom that self-preservation is the first law of nature. if he had been, perhaps he would have been prepared for this. not being prepared, however, it alarmed him the more; so away he went