Cricket

Cricket is the correct answer for the bat-and-ball game played between two teams of 11 players on a roughly circular field. Let's explore why cricket fits this description.

Game Description:
Cricket is a popular sport played between two teams of 11 players each. It is primarily played on a circular or oval-shaped field called a cricket ground. The objective of the game is for one team to score more runs than the other team.

Field Shape:
The cricket ground is roughly circular in shape, with a diameter ranging from 450 to 500 feet. The playing area is called the pitch, which is a rectangular strip in the center of the field. The pitch is where most of the action takes place, with two wickets placed at either end.

Teams:
Each team consists of 11 players, and they take turns batting and bowling. The team batting tries to score runs by hitting the ball and running between the wickets, while the team bowling aims to dismiss the batsmen and restrict the scoring.

Equipment:
Cricket is played with a bat and a ball. The bat is flat and made of wood, while the ball is hard and covered in leather. The bowler from the opposing team delivers the ball towards the batsman, who tries to hit it with the bat and score runs.

Scoring:
Runs are scored when the batsmen successfully hit the ball and run between the wickets. They can also score runs by hitting the ball to the boundaries of the field. The team with the highest number of runs at the end of the match wins.

Conclusion:
Based on the given description, cricket is the most suitable option among football, hockey, and polo. Cricket is played between two teams of 11 players on a roughly circular field, using a bat and ball to score runs. The other options do not fit the given criteria, making cricket the correct answer.