The weathering of surface material most directly formed which of these locations?
a. the himalayas
b. the great plains
c. the hawaiian islands
d. the mississippi river delta
personally i think it's a or d

D. the Mississippi River Delta

Explanation:

As weathering is break down of the ricks or is the dissolving of the ricks by the minerals on earth surface since rock has been broken down erosion transfers these bits of rocks away and thus these materials are deposited in the rover deltas and hence Mississippi river most directly forms the surface materials.

The geological terrain of this region is primarily steppe, grasslands which have poor soil for agrarian (agricultural) lifestyles. Historically, steppe people have had to rob agricultural societies (i.e. Mongols in China) or just eat meat they hunt.