Which process explains magma composition variation causing island arcs?

💡 Explanation

Mantle convection influences magma differentiation; partial melting alters magma composition therefore arc lavas vary chemically because lighter elements concentrate during upwards convection, rather than homogenous mixing or tectonic fracturing.

• Which process increases around a lava done's edge?
• Which outcome occurs when rapid glacial ablation dominates?
• Which outcome results when prevailing winds consistently refract toward headlands?
• Which mechanism causes explosive eruptions when a subducting oceanic plate is partially melted?
• Which deformation results when descending oceanic lithosphere undergoes dehydration?
• Which outcome occurs when uneven subsidence affects an alluvial plain?