by changing ocean circulation
Because climate has no affect on volcanoes. Issues like plate tectonics are more influential.
Plate tectonics cause earthquakes, volcanic eruptions, and the formation of mountain ranges around the world. Movement of the Earth's plates can also trigger tsunamis and affect the climate by creating ocean currents and shifting continents.
Plate tectonic only directly explains ocean trenches. An ocean trench forms when an oceanic plate collides with another plate and slides under it. Mudslides are most likely to occur in in hilly or mountainous areas. Most mountains have been formed by tectonic activity. Ocean currents are influenced by climate and the arrangement of the continents. While plate tectonics does change the positions of the continents, it does not directly affect climate. Tornadoes have nothing to do with plate tectonics; they are weather events.
They change its size and shape.
My opinion is very little. The Moon's gravity pulls uniformly on both sides of a tectonic plate.