According to a website, it describes how Earth's outer shell is divided into several plates that "glide over the mantle (which is the rocky inner layer)"
So, basically, it's talking about how the Earth's crust is structured.
Definition: a theory that is describing (or explaining) the structure of Earth's crust
Long-term governments should not be changed lightly <span> dictate that Governments long established should not be changed for light and transient causes.</span>
Answer:
your answer.
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