Which process can build up new land above the sea surface?

Answer: Volcanic eruptions pile up lava and ash

Volcanic eruptions pile up lava and ash ✓ — Correct! Volcanic eruptions can pile up lava and ash on the seafloor until the mound breaks the surface, creating islands like Hawaii.

Ocean currents deposit sand and mud — Wrong. While ocean currents do deposit sand and mud, they usually build underwater features like sandbars or deltas. To create land above the sea, you need solid rock or coral, not just loose sediment.

Melting icebergs drop rocks they carried — Wrong. Icebergs are chunks of ice that melt away; any rocks they carry sink to the seafloor. They don't form islands because the ice itself disappears, leaving no land above water.