. Which of the following is a "simple sentence"?
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1 point
Life under the sea is mysterious, because there is a whirlwind of activity we cannot see.
Some marine biologists study ocean animals, and others study ocean plant life.
If you are interested in sharks, you could become a marine biologist, or you could volunteer at an aquarium.
There are many types of fish in the ocean, including cod, marlin, and sturgeon.