Final answer:
The effects of tectonic plate movement caused by convection currents in the Earth's mantle can cause various geological phenomena, except deforestation.
Step-by-step explanation:
The effects of tectonic plate movement caused by convection currents in the Earth's mantle can cause various geological phenomena, including earthquake, volcanic activity, mountain formation, and the movement of continents. However, one result that is not caused by the effects of tectonic plate movement is deforestation. Deforestation is the process of removing trees at an unsustainable rate and is not directly related to plate tectonics.