Topic: Fill in the Blank,

Best Answer Explained in Below-:

The sentence "He can sing better than ___ in his family" requires a pronoun that is appropriately comparative and can refer to members within a specific group—his family. The option "anybody" is the correct choice here due to its inclusivity and comparative nature.

Choosing "anybody" implies that he is better than all possible individuals in his family regarding their singing ability. It emphasizes that among all the people in that group, he stands out in terms of skill.

While "everybody" and "everyone" could also be considered, these terms suggest a collective or totality without explicitly emphasizing a comparative element. They don't convey the same sense of contrast that "anybody" does, which is essential in a comparison.

The term "someone" is too vague and suggests a single person without capturing the comparative aspect of his superiority over all family members.

Therefore, "anybody" clearly and effectively communicates that he surpasses every individual in singing ability, making it the best choice for the sentence.