Answer:
North Carolina and South Carolina
Explanation:
A broad River, which flows through North and South Carolina
I believe that aa rift valley is happening because the two tectonic plates are combining while another plate is going downwards to create a valley. Hope this helps and have a fabulous day!
They are mid-ocean ridges<span>, which </span>form<span> where two tectonic plates are spreading apart, which is called seafloor spreading. Tectonic plates are large pieces of the earth's crust, and they interact in a number of ways. Where they pull apart is called a divergent plate boundary.</span>