Topic: Group verb,

Best Answer Explained in Below-:

The sentence "The sound died ____ in the distance" seeks a phrasal completion that effectively conveys how a sound diminishes as it moves away from the listener. In English, the phrase "died away" is commonly used to describe sounds that gradually become fainter until they are no longer audible. The word "away" in this context underscores the idea of distance, indicating that the sound is receding or moving away from the source and the observer.

In contrast, the other options do not fit as appropriately with the concept of fading into the distance. "Died down" often refers to the reduction of strength or intensity but implies a more localized decrease, rather than emphasizing distance. "Died off" can suggest a complete cessation of something and is more commonly used with life forms or populations. "Died for" doesn’t accurately fit the context at all, as it introduces ambiguity unrelated to sound.

Therefore, "died away" not only fits the structure of the sentence but also captures the essence of a sound fading as it travels farther from its source, making "away" the most suitable choice.