Answer:
C - Oceanography
Explanation:
Honestly the whole context of Physical Geography includes geomorphology, glaciology, pedology, biogeography, hydrology, oceanology, and climatology. Oceanology is just one of many.
Hope it helps!- :D
1) <em>They are fairly built up
</em>2) <em /><em>Many people live there
</em><em>3) </em><em>They are some of the largest cities in the US
</em><em />4) <em>They were some places in which, in the event of attack from the Soviet Union during the Cold War, were at the top of the lists
</em>
hope this helps
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.
It is lunar cycles *if this helped you in anyway please be sure to leave a thanks:)