According to the article by the American Heart Association, physical activity helps in many ways.

The one lady said that sleeping 8 hours a day is beneficial for overall well-being.

Drinking water is important for hydration and cellular function, said the writer.

"Eating vegetables is good for your health."

According to Source 1, paragraph 2, exercise is an important part of a healthy lifestyle.

There are many things you can do to exercise, such as walking outside or on the treadmill or riding a bike.

"The benefits of regular exercise are clearly shown in the chart below."

To test Bilbo's knowledge of riddles and float his boat.

To prove his superiority over Bilbo and to see if he will win the top prize.

To pass time and determine if he's hungry and see if Bilbo is alone.

To pass the time and have some fun because Gollum is bored.