Orographic lifting refers to
a. convection stimulated principally by local heating

b. lifting along the edges of conflicting air masses

c. forced uplift due to the presence of a physical barrier

d. none of the above

The correct answer is C. Forced uplift due to the presence of a physical barrier.

Explanation

When a current of air finds a barrier in its way, for example, a mountain, it is forced to overcome this obstacle, in this way, the air surrounds the relief that opposes and overcomes the barrier which is known in Geography as Orographic lifting.

This collision between clouds and land reliefs causes the phenomena known as windward and leeward, in which a side of the mountain works las a filter, because it takes the humidity of the clouds that clash in the mountains(windward), while the other side of the mountain or relief, receives dry air, making it a dry environment and in some cases arid (leeward). So, the correct answer is C. Forced uplift due to the presence of a physical barrier.

c. seafloor spreading occurs.

d. crust becomes molten rock.

e. denser plates slide under lighter plates.