What are some examples of constructive forces?

depositions, earthquakes, faults, and volcanoes.

Explanation:

Constructive forces are processes that cause the Earth's surface to build up or rise.

   Depositions: sediment that is moved from one area to another and builds in excess; sediment is carried by water, wind, and ice

   Earthquakes: shaking on the Earth's surface can have after effects such as a tsunami or landslide

   Faults: tectonic plate movement under the ground happen around fault lines which causes earthquakes; areas of land can raise or shift where faults are located

   Volcanoes: volcanoes release gas, ash, and lava that alter the appearance of the volcano and can change the land below (build up of rock or destroyed land and trees)

the answer is:

carbon dioxide

which fault and or fold did you find most difficult to diagram