The statement "spreading at mid-ocean ridges tends to occur in increments rather than continuously" is generally true.
Mid-ocean ridge spreading occurs through a process known as seafloor spreading, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge. This process is characterized by discrete increments of spreading, rather than continuous movement. As magma rises to the surface, it solidifies and adds new crust to the seafloor. This results in a pattern of incremental spreading along the mid-ocean ridges.
Therefore, the correct answer is:
b) True
