Copernicus is the answer you are looking for hope this helps!!!
Source- beginning of a river
mouth-end of a river
estuary- area there a river meet the sea or the ocean
tributary-river/stream that flows into another stream, river, or lake
You didn’t give us the options
Answer:
Global warming is caused by humans adding substantial amounts of greenhouse gases to the atmosphere, causing an increase in the average global temperature.
Explanation:
