Answer:
Step-by-step explanation:
The detail from the story that best explains how Say came to be separated from his troop is "fever must have took me good."
This detail suggests that Say was likely stricken with a high fever, which caused him to become disoriented and separated from his troop. The use of the word "took" implies that the fever was sudden and intense, which could have made it difficult for Say to remain with his troop. This detail helps to explain why Say was unable to stay with his troop and why he ended up lost and alone in the woods.