Changing the seating arrangement of students in the classroom encourages students to interact with different peers, which improves communication, cooperation, and understanding among them. This practice breaks fixed groupings and helps in building new relationships, ultimately promoting a healthy and inclusive classroom environment. It also enhances collaborative learning and removes social barriers.
- Option (1): The child does not feel inferior in the class – This may sometimes be a result, but it's not the primary benefit of changing seats.
- Option (2): New students are welcomed – This is also true but is a secondary benefit and does not apply universally to all classroom settings.
- Option (3): It promotes interaction among children – Correct. Changing seats helps children mix and learn to collaborate with different classmates.
- Option (4): None of these – Incorrect, as option (3) is a clear and significant benefit.
Answer: $\boxed{\text{It promotes interaction among children}}$