If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density A. increases
B. decreases
C. remains the same
D. doubles

answer; i believe the correct answer is (anemia);

carbon atoms, hydrogen, oxygen, and nitrogen.

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.