One positive benefit of a flood is that:

• A. Drought increases
• B. Nutrient-rich sediments are deposited on floodplains
• C. Water becomes mineralized
• D. Seas rise

Answer: (B)

When a flood spreads across the landscape, it leaves behind nutrient-rich sediments on the floodplains. This deposition replenishes soils with minerals and organic matter, greatly increasing soil fertility. The enriched soil supports stronger plant growth and higher crop yields once the waters recede, which is why floodplains in river valleys are often highly productive for agriculture. Over time, this natural fertilization helps sustain fertile land in regions shaped by regular flooding. The other options don’t describe a direct, beneficial outcome of floods: drought isn’t a positive consequence of flooding, and a flood isn’t typically linked to water becoming mineralized or to rising sea levels.