which results from an increase in the greenhouse effect?\no continental shifts\no wildfires\no volcanic…

Brief Explanations:

The greenhouse effect traps heat in the Earth's atmosphere. An increase in this effect leads to more heat being trapped, causing the overall temperature of the Earth to rise, which is known as global warming. Continental shifts are due to plate - tectonics, wildfires can be caused by various factors like lightning or human activity, and volcanic eruptions are related to geological processes in the Earth's mantle.

Answer:

D. global warming