Because a magnet with north and south with another magnet with north and south can pull or push each other. same way with continental drift.
The correct answer is D. gross national product. (I took the test)
The Mariana Trench<span> is part of the Izu-Bonin-</span>Mariana<span>subduction system that forms the boundary between two </span>tectonic plates<span>. In this system, the western edge of one </span>plate<span>, the Pacific </span>Plate<span>, is subducted (going under) beneath the smaller </span>Mariana Plate<span> that lies to the west.</span>
Answer:
Erosion can cause water in the rivers to become heavily polluted. The water might carry pesticides, heavy metal ions and other toxic wastes. When this water will be used for irrigation purposes, the growth of plants will be heavily affected by them.
When humans use water this contaminated water from the rivers, it will led to many diseases in humans. Also, the wild- life animals which depend on this river might take in toxic compounds due to which they might die.
The correct answer is - A) subsistence farming.
Subsistence farming is the type of farming that is mostly practiced in the less developed countries. In here we have production that is just about enough for the needs of the country (and big portion of the production doesn't even come out on the home market, but you eat what you produce, or trade with someone you know). Also this type of farming is still based on primitive tools and is heavily dependant on the climate, and that makes it very unstable and more often than not people are starving because not enough food has been produced.
