An example of a severe disruption to an ecosystem is(1 point)

seasonal flooding of a river.

a thunderstorm that knocks down some trees.

repurposing a building in a downtown area.

the loss of a river system due to contamination.

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Answered by GPT-5 mini AI
the loss of a river system due to contamination.

Explanation: contamination that destroys a river system is a large, lasting change that severely damages the ecosystem, whereas seasonal flooding and single storms are normal/regenerative disturbances and repurposing a building isn’t an ecosystem disruption.