Which of the following is NOT a major category of vegetation? A:Forest
B:Desert
C:Tundra
D:Plain

B: desert, this is a sandy and hot place so there isn’t many plants that can survive the terrain

I think it’s D Plain
Vegetation regions can be divided into five major types: forest, grassland, tundra, desert, and ice sheet.

Answer (d) may increase or decrease porosity through dissolution or deposition;