There are five contour lines between 180 and 80 so...

2. 20m is the answer
Answer:
The development of railroads made money for the steel industry in which made money for companies. Since steel is sturdy and costs cheaper to make, more and more railroads will be built across the country. This made transportation easier, and the population in major cities rose due to the increase in rail roads. More and more businesses grew because they were able to transport their goods across the country.
Explanation:
yes
Answer: Antarctica.
Explanation: We know that every six months, there will be sunlight. And after that, there will be night. Judging by the month right now. It's the 7th month. This means there will be no sunlight for the next six months in Antarctica. (If you get this wrong, I'm sorry.)
B, Because they are really technological especially after ww2
The focus is the place inside Earth's crust where an earthquake originates. The point on the Earth's surface directly above the focus is the epicenter. When energy is released at the focus, seismic waves travel outward from that point in all directions.