The diagram above shows different types of tectonic plate boundaries.  based on the diagram, trenches are found at subduction zones, which are a type of

no

explanation:

since the earth is flattened at the poles and bulges at the equator, geodesy represents the figure of the earth as an oblate spheroid. the oblate spheroid, or oblate ellipsoid, is an ellipsoid of revolution obtained by rotating an ellipse about its shorter axis.

answerformal;