I assume that the question refers to the political affiliation of the Islands (They are Islands in the Mariana Trench, in the Pacific Ocean, south of Japan) - they are politically linked to the US - the correct answer is a). For example the Mariana islands have a commonwealth status within the US.
Answer:
C. Density differences
Explanation:
Lithospheric plates are equivalent to tectonic plates. They are located in the Earth's uppermost layer
Answer: Tropical rainforests are very hot and wet places. They have over 2,000 mm of rainfall a year. The climate is very consistent and there are no seasons. There is a very thin layer of fertile soil at the surface where leaves decompose and plants have adapted to this by growing roots really close to the surface.
Explanation: