Problem: The fish ate the worm . *It* was tasty.

Are "It" and "the worm" the same?
Answer: yes

Problem: Babar wonders how he can get new clothing. Luckily, a very rich old man who has always been fond of little elephants understands right away that he is longing for a fine suit. As he likes to make people happy, he gives *him* his wallet.

Are "him" and "Babar" the same?
Answer: yes

Problem: Fred is the only man still alive who remembers my great-grandfather . *He* is a remarkable man.

Are "He" and "my great-grandfather" the same?
Answer: no

Problem: The mothers of Arthur and Celeste have come to the town to fetch *them* . They are very happy to have them back, but they scold them just the same because they ran away. them .

Are "them" and "Arthur and Celeste" the same?
Answer:
yes