What is defined as a "stream"?

A "stream" is defined as water that flows continuously within a permanent bed or channel, exhibiting a current. This definition captures the essential characteristics of a stream, including the presence of flowing water, which distinguishes streams from other bodies of water. The defining features of a stream include its flow, which can vary in speed and volume, as well as its ephemeral or permanent nature depending on environmental factors.

The other options depict bodies of water that do not fit within this definition. Stagnant water bodies, such as ponds or lakes, are stationary and lack a current. Water sources without a current are not considered streams since they do not exhibit the flowing characteristic essential for this classification. Lastly, a temporary puddle does not have a defined, permanent channel and can dry up quickly; therefore, it cannot be classified as a "stream." Understanding these distinctions helps clarify the specific nature of streams as flowing water within a defined channel.