How do you do this i don't understand

Give an example of a situation in which an individual's pursuit of economic self-interest may not benefit but instead harm the rest of society

Most signs are diamond-shaped, with a yellow background and black letters or symbols. a. regulatory b. guide c. warning d. construction

Select the sequence that lists earth's layers from hottest to coolest. a. mantle, crust, core b. core, mantle, crust c. crust, core, mantle d. mantle, core, crust