The correct answer is C. ephemeral stream.
An ephemeral stream is a stream that flows only during periods of precipitation. It does not have any base flow contribution, which is the flow of water that comes from groundwater or springs. Ephemeral streams are common in arid and semi-arid regions, where precipitation is infrequent and often occurs in the form of intense storms.
A perennial stream is a stream that flows year-round. It has a base flow contribution, which is the flow of water that comes from groundwater or springs. Perennial streams are common in humid regions, where precipitation is frequent and evenly distributed throughout the year.
An intermittent stream is a stream that flows only during certain times of the year. It may flow during the spring and summer, when precipitation is more common, and may dry up during the winter and fall. Intermittent streams are common in semi-arid regions, where precipitation is seasonal.
None of the above is not a correct answer.