The answer is Pennsylvanian. I worked on this before. The Pennsylvanian era is a subperiod of the Carboniferous Period. i really hope this helps :)
By breaking into a free nation
Oceanography but the study of ocean creatures is Marine Biology
I’ve researched this for an hour and don’t see any of these answer choices , but my method is “ when in doubt C your way out “
For volcanoes to emerge oceanic and continental tectonic plate has to collide. Oceanic plate will subduct (sink), and will melt. Molten plate rises through crusts and forms volcanoes.
In Himalayas two sections of continental crust and create mountains (they don't subduct and melt).