Final answer:
Tectonic plate activity is the earth shaping process at work on the islands of Equatorial Africa.
Step-by-step explanation:
The earth shaping process at work on the islands of Equatorial Africa is tectonic plate activity. This region experiences frequent earthquake and volcanic activity due to the movement and collision of tectonic plates.
These tectonic processes have created the mountainous terrain and high mountain ranges with peaks reaching elevations of over 15,000 feet. Additionally, the active plate action has caused destruction of infrastructure and loss of life due to earthquakes and volcanic eruptions.
Overall, the tectonic plate activity is the major earth shaping process affecting the islands of Equatorial Africa.