Neither. Geomorphology is the name given to the science or the study of landforms and their formation.
The processes that create landforms may be constructive (e.g. sedimentation / mountain building etc.) or destructive (such as the formation of valleys by glaciation) however.
destructive
constructive and destructive
is deposition constructive or destructive
it is both constructive and destructive
hurricanes can be both constructive or destructive.
Destructive. Destructive means destroying and constructive means to make something. An earthquake is both destructive and constructive.
both constructive and destructive forces
is a cave a constructive force or a destructive forcce
constructive
constructive
A tsunami usually occurs on a destructive plate boundary.
destructive