Answer:
a and c I think maybe d too but prob not
The Indian Ocean basin form the ring of fire.
Answer: countries with high internet usage tend to have a high standard of living
Explanation: it makes the most sense
I would say B because of their population
The reason why Greenland is so sparsely populated is because, despite its name, Greenland is actually covered with ice (almost 80% of the territory is ice), meaning that it's very hard for people to settle.