Because a magnet with north and south with another magnet with north and south can pull or push each other. same way with continental drift.
The answer is for the question is
Answer A
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<h3>Questions: </h3>
What does a knickpoint indicate on a river profile
<h3>Answer: </h3>
A knickpoint is a steep section of a river's profile that can range in size from a single waterfall to a multi-kilometer high-gradient region.