How would a fast-flowing river be most likely to move sand-sized particles of sediment? how would a fast-flowing river be most likely to move sand-sized particles of sediment?
a.
it would lift them and carry them downstream.
b.
it would dissolve them completely in solution.
c.
it would roll or slide them along the streambed.
d.
it would deposit them on the streambed.

The correct option is A.

Sediments refers to those particles that are found inside water bodies such as rivers, streams, etc. The ability of the water bodies to carry these particles when flowing depend on the rate of flow of the river. A fast flowing river has high velocity and this will enable it to carry with it most of the particles that are found in it. For instance, a fast flowing river will conveniently carry sand size sediments wit its flow because of its high velocity.

The correct answer is option a, that is, it would lift them and carry them downstream.  

The sediments refer to the particles, which are found within the water bodies like streams and rivers. The tendency of the water sources to carry the sediments relies on the rate at which it is flowing. For example, a fast flowing river, that is, flowing with a greater velocity will possess the tendency to lift the majority of the sediments and carry them downstream with it.