Final answer:
Streams can form due to geological and meteorological events, and human activities can cause them to dry up, but they do not always flow continuously.
Step-by-step explanation:
Streams and rivers are dynamic ecosystems influenced by various factors. The given options explore conditions for a stream's formation and its possible cessation.
- A) True: Streams can indeed form through geological processes. These include snowmelt, rainfall, and the seepage of groundwater to the surface. Geological uplift, volcanic activity, or the movement of tectonic plates can give rise to new streams or alter the flow of existing ones by changing the land's elevation or shape.
- B) True: Streams can also cease to exist due to human activities. Diverting water for agriculture, building dams, urban development, or pollution can dry up streams or significantly alter their flow and ecology.
- C) False: Streams do not always flow continuously without interruption. Seasonal variations, droughts, or upstream water use can cause a stream to have intermittent flow or even dry up at times.
- D) True: Meteorological events such as heavy rainfall, hurricanes, or rapid snowmelt can lead to the formation of streams, either by contributing to existing waterways or by creating new paths for water flow.
Streams form through geological and meteorological events and can cease due to human activities. Continuous flow is not guaranteed as various natural and anthropogenic factors can cause a stream to dry up or have intermittent flow.