I need help please help me

Which of the following areas have the highest population density? a) quebecb) united statesc) californiad) new york city

Which of the layers of the earth has the following three characteristics? i. it is made of molten rock. ii. it has currents that are constantly moving. iii. earth’s plates float on top of its currents.

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