The answer is Pennsylvanian. I worked on this before. The Pennsylvanian era is a subperiod of the Carboniferous Period. i really hope this helps :)
it helped bring over different culturally and different type of spice such as pepper, ginger ,nutmeg it was developed by indians and arab merchants. by the suez canal opening it adapted to steam bouts and new communication device...
hopfuly this helps some ^v^
These subs are useful in studying the ocean floor, where it is so deep that divers would be crushed by the water pressure. For example, research submersibles are used to study shipwrecks like the RMS Titanic.
The answer is B I believe
Answer:
The mantle lies just below the core. The mantle and core are made up of hard, solid rock.
Explanation:
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