From what does the ozone layer protect the earth earthquakes volcanic eruptions asteroid impacts ultraviolet radiation

After railroads, the next revolution of transportation came with the development of (a) automobile (b) telegraph (c) steam engine

Why might a geographer choose to present information in a map rather than with stactics or in me asap

Apex! which term describes the expanse of flat land in this photograph? (see picture) a.) mountainb.) plainc.) rift valleyd.) plateau