A meadow ecosystem formed where there was once a
pond.
Which three statements describe how the pond turned into the meadow?
A. Large water plants grew in shallow water around the edge of the
pond
B. Runoff carried water and organisms into a low place on land.
C. Soil filled in the pond, and it no longer held standing water.
D. The pond got shallower as sediment and other materials covered
its bottom
