Question

what is the primary composition of the oceanic crust? basalt sandstone limestone granite

Explanation:

The oceanic crust is mainly composed of basalt. Basalt is a common volcanic rock that forms from the cooling of lava on the ocean floor. Sandstone is a sedimentary rock formed from sand - sized mineral particles or rock fragments. Limestone is a sedimentary rock composed mostly of calcium carbonate. Granite is a common igneous rock found in continental crust, not oceanic crust.

Answer:

Basalt