(science)
a hot plume of mantle material, which may extend to the core-mantle boundary, produces a volcanic region a few hundred kilometers across called a

a.)volcanic arc

b.)mantle plume

c.)hot spot

d.)ring of fire

Answer asap 50 points which of the following distinguishes the soil composition of grassland? 1. the soil supports large trees with thick, long roots, so horizon b needs to be deep enough to sustain larger flora. 2. the soil supports large trees with thick, long roots, so horizon a needs to be deep enough to sustain larger flora. 3. the soil supports small plants and shrubs with short roots, so horizon a needs to be deep enough to sustain smaller flora. 4. the soil supports small plants and shrubs with short roots, so horizon b needs to be deep enough to sustain smaller flora.