Final answer:
The statement about volcanoes becoming less active and more eroded as they move away from a hot spot is true. The North American plate's rate of motion has been variable, and Yellowstone has had more significant volcanism compared to Anahim when considering caldera size and eruption history. option D is correct
Step-by-step explanation:
The statement that the farther one goes from a hot spot, the less active and more eroded the volcanoes will be is true. This is because a hot spot is essentially a stationary point deep within the Earth's mantle where heat rises and can create volcanoes on the surface.
Regarding the rate of motion of the North American plate along the hotspot track, it has not been constant; geological evidence suggests that plates can change their movement speed due to various tectonic forces. When comparing the
Yellowstone and Anahim hotspots, the larger calderas and more extensive volcanic eruptions in Yellowstone suggest that it has had more significant volcanism over the same time period. This could be influenced by factors like tectonic history and magma supply. option D is correct