Final answer:
The boy in "Jim at Bat" and Billy Crystal in "A Crystal-Clear Love Affair" share a passion for baseball.
Step-by-step explanation:
One similarity between the boy in "Jim at Bat" and Billy Crystal in "A Crystal-Clear Love Affair" is their passion for baseball. In both selections, the characters are deeply involved in the sport and demonstrate dedication and love for the game. For example, in "Jim at Bat," the boy spends hours practicing and dreaming about playing baseball, while in "A Crystal-Clear Love Affair," Billy Crystal devotes his time and energy to playing in a celebrity softball game.