Answer:
... that cannot be seen directly. These include political boundaries.
The correct answer is Are long, low waves out in the ocean that pile up near shore because such waves, or parts of such waves, move slower in shallower water.
Explanation:
A tsunami is a natural disaster in which waves flood the land. This phenomenon is often caused by eruptions or earthquakes in the ocean. Moreover, as a tsunami starts waves increase their longitude, indeed the longitude of waves in a tsunami can be as long as 100 kilometers. Additionally, once waves reach shallow water near the coast these increase their speed due to the friction of the seafloor, and at this point, waves pile up to form waves up to 30 meters and this causes the flood on the land and the destruction of structures. According to this, tsunamis "Are long, low waves out in the ocean that pile up near shore because such waves, or parts of such waves, move slower in shallower water."
I am unsure of how to answer this completely, but I will give it my best.
It could be meant that there is no physical boundary holding them apart and that the world's oceans simply flow into each other rather than being separated. Such as the pacific and Atlantic. They are not held apart, they flow around countries and flow into each other at a certain point.
Answer:
What do you want me to do in this question?
