What caused the indus valley civilization to disappear?

What two things are being compared in this epic simile (the odysseus)

Which impact did the civil war have on the spread of disease in texas a. disease decreased bc people left the area to fight in the war b. disease increased bc medicine was in short supply. c. disease increased bc many new diseases were brought to the area d. disease decreased bc confederate doctors distribute new medicines to local communities

Which best describes the purpose of the second continental congress?