Q. The kids swam together . . . . . . . . their mother.
✅ Correct Answer: (B)
beside
Explanation: Beside is a preposition. It means 'at the side of' or 'next to'. Hence it makes the sentence meaningful.
Explanation by: Team MCQ Buddy
Beside is a preposition. It means 'at the side of' or 'next to'. Hence it makes the sentence meaningful.