What is the difference in energy released by a magnitude 5 earthquake and magnitude 8 earthquake?

Which area on the map would be most likely to have the most oil exploration in since the start of the 21st century? a) b) c) d) plz me

One disadvantage that darwin faces today is w. enemy attacks x. natural disasters y. lack of land bridge z. high population density

What gigantic island is primarily in the arctic circle?