What effect does an ocean have on the climate?
rushing water from tides cools the land.
there is no influence on climate from an ocean.
cool ocean air causes a cool climate.
warm ocean air causes a dry climate.

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.