If your findings disproves your hypothesis then your hypothesis is probably wrong.
Answer:
Localized flooding may be caused or exacerbated by drainage obstructions such as landslides, ice, debris, or beaver dams. Slow-rising floods most commonly occur in large rivers with large catchment areas. The increase in flow may be the result of sustained rainfall, rapid snow melt, monsoons, or tropical cyclones.
Explanation:
Where is the work (I'll edit the answer)
Many acids will react with a metal to produce hydrogen gas and a metal salt.
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