Question

which results from an increase in the greenhouse effect?
continental shifts
wildfires
volcanic eruptions
global warming

Explanation:

The greenhouse effect involves trapping heat in the Earth's atmosphere. An increase in it leads to a rise in global average temperatures, known as global warming. Continental shifts are tectonic - related, wildfires are often due to human or natural ignition (not directly greenhouse - effect increase), and volcanic eruptions are geological events, not caused by greenhouse - effect increase.

Answer:

D. global warming