D. Greenhouse gas feddback
I'm not for sure but I believe this is the answer sorry if I get it wrong in advance
Volcano/hot spot they are made of many plumesbof lava coming out of the mantal and hardening. After a long time, the crust moves from continental drift but the hot spot stays in the same spot there for creating a new island
Answer:
Pretty sure the answer is Panama Canal
Explanation:
We share this as 2 countries and it makes life easier for both sides. Also, the Gulf of Mexico is a shoreline.