Why is this the answer?

The answer is turtle because this fun riddle uses a wonderful trick to describe how this special animal swims and lives. It is like a secret code for a turtle. Let us be detectives and look at the clues one by one. The first clue says, "rows quickly with four oars." Have you ever seen someone row a small boat? They use long paddles called oars to push the water and make the boat move forward. A turtle, especially a sea turtle swimming in the big ocean, has four strong legs or flippers. When the turtle wants to swim, it moves all four of its flippers back and forth in the water. This movement is exactly like a person rowing a boat with four paddles! If you watch a turtle swimming, you can see how smoothly it glides, using all four flippers just like four powerful "oars" to push itself. The riddle says it "rows quickly" because many turtles can be surprisingly fast and graceful when they are in the water, darting around to catch food or travel long distances. Now for the second part, which is the best clue of all. It asks, "but never comes out from under his own roof?" You know a roof is the top of a house that keeps you safe and dry from the rain and sun. For a turtle, its hard shell is its permanent home and its "roof." The shell is a special, strong armor that is actually a part of the turtle's body, made up of its bones. It is stuck right to the turtle's back! Since this shell is not something the turtle can take off or leave behind, the turtle is always under its own roof, no matter where it swims or walks. If a turtle feels scared or a predator is nearby, it can quickly pull its head and legs right inside that strong, protective roof for safety. This amazing animal carries its home everywhere and uses its four flipper "oars" to explore the world. That is why the turtle is the perfect match for this clever riddle. It is a puzzle that turns the turtle's natural parts into fun words.