Where do most otters live, and what are two examples of places mentioned in the passage?
Most otters live in rivers, lakes, coastal waters, and even some oceans around the world. Two examples mentioned are rivers and coastal waters (or oceans / lake
Why do otters spend a lot of time grooming their fur?
Otters spend a lot of time grooming their fur to keep it clean and shiny (and waterproof, which helps keep them warm in cold water).
How do sea otters use tools, and what do they use them for?
Sea otters use rocks as tools to crack open shellfish.