2. A. The mid-ocean ridges
(This is asking for what form. The Andes is a mountain range in Peru)
3. C. Subduction causes the ocean floor to sink into deep ocean trenches.
(Subduction is when part of the ocean floor sinks under a deep-ocean trench and return the the mantle; this is caused by the movement of tectonic plates)
C) around the base of Kauai, the oldest of the Hawaiian islands
Explanation:As the Hawaiian island is located n the southeastern parts of the seen islands spreading from the center and that reaches of the pacific plate margins and lies about the 56,00 km further to the southeast. Thus there is a sedimentary layer that is thickest at the older base of the munt Kauai has a greater amount of the from of biodiversity and fossil records. That can be found above the seafloor in the oceanic crust.
D. Move apart along a divergent boundary plate boundary
slab pull and sea floar speradiny
Evidence for the sea-floor spreading has come from?
Fossils from South America and Africa.
Hope this helps :D