<span>C. Controlled Variables
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Your question is kind of confusing. but i will answer it as best i can.
the opposite poles of two magnets attract. therefore, when the red of a magnet or compass is pointing north, it is because it is being attracted in that direction by the south end of another magnet (often colored blue) - this is the imaginary magnet inside of earth. hope i helped(:
Vertebrates, sexual reproduction, and fusion
Answer:
Move Apart.
Explanation:
A divergent boundary is formed when tectonic plates pull apart from each other. The old crust pulls itself in opposite directions and liquid rock comes up from below.
Hope this helps. Mark as brainslist please :)
Answer:
A class system is a more smooth system, caste is more of a system that changes consistently.
Explanation:
"Class system is typically more fluid than the caste system or the other types of stratification and the boundaries between classes are never clear-cut. Caste system is static whereas the class system is dynamic. ... In the caste system, individual mobility from one caste to another is impossible."
