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4. They're selling fruit and vegetables under the protection of these colorful umbrellas.
9. We're under a tornado warning. Someone saw a funnel cloud and reported it to the government weather service.
10. He's a scuba diver. He goes under the sea to look for interesting things.
(You can say "under the ocean," "under the sea," or "under the water." They all mean pretty much the same thing.)
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