Answer:
A
Explanation:
estuary is the tidal mouth of a large river, where the tide meets the stream.
No because you can't have everyone in the urban areas it would be to crowed and
If the world temperature rises by two degrees, mountain glaciers and rivers will start to disappear and mountainous regions will see more landslides, as the permafrost that held them together melts away.
For more info: https://www.google.com/amp/s/news.sky.com/story/amp/what-will-happen-as-the-world-gets-warmer-10336299
