Question

what does tectonics refer to?
a how and where plates move on earth
b the technological factors that can influence
plates
c volcanism
d specific rock types that occur at mid - ocean
ridges

Explanation:

Tectonics (plate tectonics) is the study of the movement of Earth's lithospheric plates. Option a describes how and where plates move, which aligns with tectonics. Option b is incorrect as tectonics isn't about technological factors. Option c (volcanism) is a result of tectonic activity, not the definition of tectonics. Option d (rock types at mid - ocean ridges) is related to tectonic processes but not the definition of tectonics.

Answer:

a. How and where plates move on Earth