Even though streams that flow through valleys generally move very fast, the stream load is
mostly made of suspended load. Usually, bed load is only found in mountain streams with
a high gradient. Why?
O
A. rocks and boulders are only found in
gullles which are in the mountains
O
B. streams with low gradients usually move
slowly and cannot carry bed load downstream
C. large rocks and boulders just aren't very
common at lower elevations
D. both a and b

D

Explanation:

The gradient in bed load is mostly made up mostly of gravels and sands, broken down versions of larger boulders and rocks, which are most commonly found in mountainous areas. Streams with low gradients cannot carry bed load down stream because it moves slowly and without much force. Gravels and sands couldn't move downstream because the water flow isn't strong enough to move them or to keep them in motion.

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you and have a wonderful day

but there is no

i guess you forgot putting it.