Explanation: A stream transports its materials in different ways-
<u>Dissolved load-</u> Here, the materials gets dissolved when mixed with water and flows along with the stream.
<u>Suspended load</u>- Here, the materials are not fully dissolved in the water but they can be carried from one place to another in suspension mode, by the river.
<u>Bed load-</u> Bed load are transported in three different ways such as-
Sliding- here, the materials slides down along a curved surface under the water and carried away.
Rolling- here, the materials are solid and due to force exerted by water, it can roll and move to distant places.
Saltation- here, the materials are carried away in a series of jumps.
Thus, the most appropriate answer is option (B) i.e bedload.