Abyssal plains are large, flat features that cover about one third of the planet.
<h3>What are Abyssal plains?</h3>
The broad, flat, sediment-covered regions of the deep ocean floor are known as abyssal plains.
They have a slope of less than one foot of height variation for every thousand feet of travel, making them the flattest, featureless places on Earth.
When tectonic plates separate, magma rises and forms new crust, filling the space that was left between the plates.
When sediments from the shoreline pass over the continental shelf, tumble down the continental slope, and deposit on top of the more recent oceanic crust, they create an abyssal plane.
The answer would be B. Japan’s population has been at a steady decrease since as early as the year 2000 and the United States population has been at a steady increase dating back to 1790 from the research I have seen.
