After watching the video on flooding, what would be a major change that can happen in a river ecosystem that causes a flood? The amount of water in the
river, the flow rate of the water or both? Explain your answer!

Both

Explanation:

Depends on what happened in that video. I would rewatch it and write about what the video said about flooding and relate it to the river. Could be an ice jam or something else slowing the flow of water suddenly opened up. A breaking dam? Flash floods from an abundance of rain. As the amount of water in the river increases, so does the flow rate. If the amount of water suddenly increases more than the river was used to/it could hold, it will flood.

Rewatch the video and see if this relates at all :)

most community's take hundreds of years to become stable

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above