c. A dam can significantly reduce or shut off the supply of sediment to a delta.
Explanation:
The rivers that drain into the ocean have deltas and they form the mouth of the river and the soil rich land is a called as the delta. The dam can significantly stop or shut the supply of the sediments to the deltas.
Deposits of coal in Antarctica are evidence of continental drift. The fossilized plants in these deposits show that Antarctica was once near the equator.
