Final answer:
The subject of the question is English, and it asks about the meaning of a specific line from a song or poem. Based on the given options, the most likely explanation for the father's behavior in the line is a gambling habit.
Step-by-step explanation:
The subject of the question is English, as it is asking about the meaning of a specific line from a song or poem.
The line in question is from a song and it portrays a situation where the father figure has done something wrong and it is affecting the relationship and love in the family. The options given (A) New car, (B) Secret life, (C) Big house, (D) Gambling habit) represent different possible explanations for the father's behavior, with option (D) Gambling habit being the most likely one, considering the mention of cheating and the idea of Daddy having something that he had on the weekend and now Momma can't love him.