Since the U. S. has so many resources, why do we trade with other countries? A Lack of workers
B Comparative advantage
C Create goodwill
D Too many products

Since the U.S. has so many resources why do we trade with other countries? Comparative advantage. Create goodwill. Lack of workers. Too many products.

Explanation:

LACK OR WORKERS

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the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.