is an area where two tectonic plates move towards one another

The correct answer is convergent boundary.

Explanation:

In geology it is known as the limit to convert the place where the tectonic plates move between them, where there is always one that is oceanic. The common movement of these plates goes down, acquiring a bent shape that ends up sinking over another in a place called the asthenosphere.

the only other powers were germany russia and uk and they were too busy fighting each other wearing each other down   that the us was becoming strong and they were becoming weaker