Question

why is the rising river dangerous? the river will get so high that the whole town will be underwater. the river will get so high that the town will have to build new bridges. the river will make the air temperature warmer. the river will become too narrow for boating.

Explanation:

When a river rises to a very high level, it can flood the surrounding areas. If it gets extremely high, it can submerge an entire town, which is a major danger. Building new bridges (if the river level rise is not extreme enough to flood the town) is more of an inconvenience rather than a life - threatening danger. A rising river is not typically associated with making the air temperature warmer. And a rising river usually widens (due to overflowing) rather than becoming narrower.

Answer:

The river will get so high that the whole town will be underwater.