Question

which feature of earth is created at mid - ocean ridges?
new island chain
new underwater caves
new continents
new ocean floor

Explanation:

Mid - ocean ridges are divergent plate boundaries. Here, magma rises from the mantle. As the magma cools, it forms new oceanic crust, creating new ocean floor. Island chains are often formed at hotspots (e.g., Hawaiian Islands). Underwater caves are formed by erosion processes like wave action and dissolution of soluble rocks. New continents are not formed at mid - ocean ridges; they are formed through processes like accretion over long geological timescales involving multiple tectonic and geological events that are more complex than just the activity at mid - ocean ridges.

Answer:

new ocean floor