Answer:
a very powerful and influential nation (used especially with reference to the US and the former Soviet Union when these were perceived as the two most powerful nations in the world).
Answer:
D
Explanation:
Idrk know how to explain this but um basically deposition of valley walls will create a river-like path which over the years creates a river I think. I just used process of elimination tbh... Hurricanes don't make rivers so B definetley isn't the correct answer. A collapsed volcanic caldera has legit nothing to do with rivers so thats a no for C. and that leaves A and D and if you poor like 100 whole jugs of water into soil its not going to create a river which leaves B as the only answer that makes sense. (I hope this somewhat helps, if need be I can try to elaborate more in the comments)
The National Mall is a long narrow but open area where many museums are located, but I'm not sure if that's the correct answer.