Why do historians classify ancient Sumer as a civilization?

Select a real-life situation in which a person may face isolation due to a difficult condition, as gregor does after turning into an insect. you may choose a situation from the list below, or use a different one if your teacher agrees with your choice. psychological conditions: dementia, schizophrenia, depression, or post-traumatic stress disorderphysical conditions: paralysis or severe injury, going blind or becoming deaf, or facing an addictionsocial conditions: being wrongly convicted of a serious crime, or moving to a place where some attribute of the person makes others around the person view him or her with contempt or suspicionwhat condition did you choose to compare with gregor's condition?