Answer:
b: rocks
Explanation:
The biosphere is one of the several spheres that make the complex system of Earth. This sphere is the one that is consisted of all the living organisms on the planet. The animals, plants, viruses, algae, bacteria, all make up this system, and so far at least, it seems that the biosphere is something unique to Earth.
The biosphere is in constant interaction with the other spheres, and it is dependent on them, as they are dependent on it. The influences of the biosphere on the other spheres can be easily seen in the change of the composition of the atmosphere, as part of the biosphere is pumping up oxygen to it. The oxygen, in turn, results in cooling off the global temperature, making the oceans more suitable for life, and cause much more corrosion, thus a circle of interaction between all of the spheres is created.
Do you mean the center of the earthquake?
If so, it is the hypocenter (focus)
Gravity holds these planets in space. Without gravity everything would collapse and the world would end as we know it.
Market economy because market economy means that business is almost entirely privately owned by the seller
Most divergent plate boundaries are underwater (Iceland is an exception) and form submarine mountain ranges called oceanic spreading ridges. While the process is volcanic, volcanoes and earthquakes along oceanic spreading ridges are not as violent as they are at convergent plate boundaries.
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