What is a body of water formed when a river empties into the sea without forming a delta?
a) Estuary
b) Lagoon
c) Tributary
d) Glacier
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Answer: a) Estuary
Explanation:
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Estuary: A partially enclosed coastal body of brackish water where freshwater from a river meets and mixes with saltwater from the sea. When a river flows directly into the ocean without depositing enough sediment to build a delta, it forms an estuary.
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Lagoon: A shallow body of water separated from a larger body of water (like an ocean) by reefs, barrier islands, or sandbars.
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Tributary: A stream or river that flows into a larger stream, main stem river, or lake, rather than directly into an ocean or sea.
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Glacier: A persistent, large body of dense ice that is constantly moving under its own gravity.
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