Which plate boundary and movement commonly creates ridges, like the mid-atlantic oceanic ridge?

There are four types of plate boundaries:

Divergent boundaries, where new crust is generated as the plates pull away from each other. Convergent boundaries, where crust is destroyed as one plate dives under another. Finally, there's Transform boundaries, where crust is neither produced nor destroyed as the plates slide horizontally past each other.                                                                                                                     Divergent Boundaries create mountain ranges, as the plates pull apart and magma from Earth's core rises through the gap and flows out. It then cools, and over millions of years, this process builds until the magma has risen up so far it is a mountain

Which one is the underlined word?

Aeolian processes,  pertain to  wind  activity in the study of  geology  and  weather  and specifically to the wind's ability to shape the surface of the  earth  (or other  planets). winds may  erode, transport, and deposit materials and are effective agents in regions with sparse  vegetation, a lack of soil moisture and a large supply of unconsolidated  sediments. although water is a much more powerful eroding force than wind, aeolian processes are important in arid environments such as  deserts