A student made a model of a river in a sandbox. A pile of sand represents soil and bits of rock in the riverbed. Water pouring from a hose represents river water as it flows downhill Which two characteristics are limitations of the student's model? A. The model soil is nothing like the soil found in a real riverbed. B. The model is much smaller than a real river. C. The model river water flows downhill instead of uphill like real river water does. D. The model is missing plants, fish, and other details found in a real river.

A. The model soil is nothing like the soil found in a real riverbed.

D. The model is missing plants, fish, and other details found in a real river.

Explanation:

The use of the sand by the student to represent his or her model river's soils is quite different from what is obtainable in a normal river. Normal river has rocks and stones not sands. Also, the model river is missing  other aquatic animals like fishes, plants to bring it closer to same resemblance with normal real river.

organisms

explanation:

i believe it's organisms

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