Question

which of the following best describes the difference between a source and a mouth? a source is completely surrounded by land, and a mouth is partially surrounded by land. a source is where a river or stream empties into another body of water, and a mouth is where it originates. a source is where a river or stream originates, and a mouth is where it empties into another body of water. a source is partially surrounded by land, and a mouth is completely surrounded by land

Explanation:

To determine the correct answer, we analyze the definitions of a river's source and mouth. A source is the starting point (origin) of a river or stream, while a mouth is where the river empties into a larger body of water (like a lake, ocean, etc.).

• The first option is incorrect as it describes a lake or inland sea (lagoon - like) rather than source/mouth.
• The second option swaps the definitions of source and mouth.
• The fourth option also misdefines them (describing something like a bay vs. a lake, not source/mouth).
• The third option correctly states the source is the origin and the mouth is the outflow point.

Answer:

C. A source is where a river or stream originates, and a mouth is where it empties into another body of water. (Note: Assuming the third option is labeled as C; if the original options had different labels, adjust the identifier, but the text of the correct option is as above.)