Are you looking for a specific word? The answer is border but I see you've included this in your question so I believe you do not understand the concept.
It would be D.
Explanation:
Spain lost control over Cuba, Puerto Rico, Guam, and the Philippines which are oversea islands
Answer:
The fact that several nomadic empires, such as the Mongol Empire, have been short-lived is mainly based on the lack of defense structures built in a planned, strategic and orderly manner.
Due to their nomadic nature, these empires and civilizations did not tend to establish new cities or urban centers, with which their conception of territorial expansion was the mere possession of the territory. Therefore, in the event of enemy attacks, the territories were not sufficiently protected to repel these types of attacks. Thus, these empires could not sustain their power because they did not have the necessary building structures for it.
Online dating can be in like a game you might not even now the person they can be like twice your age! But a distance relationship you know who they are because you can call them or face time and text them and send pictures of yourself to them. You need to know them for a long time so you can trust them because they might be cheating but if you know them for a long time you would know if they would cheat or not and for online dating it dosnt matter if you know the person for a long time they can be cat fishing you or lieing to you and a little extra you should be a long distance relationship then a online relationship. Hope this helps!
