The Aleutian Trench is formed by the subduction of the Pacific Plate underneath the North American Plate along the coastline of Alaska. What would most likely be observed at this tectonic boundary? (3 points) Select one:
a. Chasms reaching the mantle are caused by two tectonic plates moving away from each other
b. Creation of new seafloor formed from the solidification of magma between the plates
c. Explosions underneath the Earth's crust caused by the collision between two tectonic plates
d. Frequent earthquake activity caused by the movement of tectonic plates against each other