Answer:
As new seafloor moves away from an ocean ridge, the seafloor cools and becomes less dense than the material beneath it.
Explanation:
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Lunar eclipses occur when the earth comes between the Sun and the Moon. This positioning quickly changes due to both the Earth and the Moon orbiting around the sun and each other.
Ecologists are unsettled on whether or not any truly commensal interactions among organisms take place or not because it depends on the kind of organisms. When a bird makes a nest in a tree and lays eggs, the eggs are definitely safe. This procedure does not harm the tree directly, but it can stop the sunlight from reaching some parts of the tree. This actually shows that the bird has benefited from the situation but the tree has lost out.
Answer:
1860s
Choice D is correct
Explanation:
The US labor movement began in the 1860s
