Coastines on opposite continents appear to fit like puzzle pieces, indicating that they were once joined.
ANSWER: line b
I hope this answer is right
The answer is: [A]: troposphere .
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Answer:
The greenhouse effect is a natural process that warms the Earth's surface.
Explanation:
When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. Greenhouse gases are absorbed energy that warms the atmosphere and the surface of the Earth.