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Answer:

3. river flooding can happen when there is debris in the river or dams that block the flow of the water. ... Storm surge and tsunamis also cause flooding.

4. Forest fires always start by one of two ways - naturally caused or human caused.

Forest fires increase carbon dioxide levels in the atmosphere, contributing to the greenhouse effect and climate change. In addition, ashes destroy much of the nutrients and erode the soil, causing flooding and landslides.

Explanation:

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