Final answer:
Line 3) 'They came to a garden, enclosed by a low wall without any opening.' is the line that does not help develop the universal theme as it is a narrative detail that does not directly address the relative advantages of different situations.
Step-by-step explanation:
The question pertains to identifying which line from a fable does not help develop the universal theme. The theme in question seems to reflect on the benefits and drawbacks of different situations in life and may touch on the irony of seeking advantage in physical attributes or situations, which is hinted at in the lines provided from the fable. After reviewing the lines presented in the question, we must examine each one to determine its relevance to the thematic development.
Line 1) 'Tall is good, where tall would do; of short, again, 'tis also true!' clearly showcases the relative nature of advantages depending on the situation.
Line 2) 'A camel said, 'nothing like being tall! Look how tall I am!' contributes to the theme by expressing the pride of being tall, suggesting an advantage.
Line 3) 'They came to a garden, enclosed by a low wall without any opening.' does not seem to relate directly to the theme as it is more of a narrative detail than a thematic one.
Line 4) 'The pig entered by the gate, and, after having eaten his fill of the vegetables within, came out, laughing at the poor camel...' speaks to the specific advantage the pig had in this situation, reinforcing the theme.
Based on this analysis, line 3 is the least relevant to the theme as it does not contribute directly to the concept of advantages or pleasures based on one's situation but rather sets a scene for the narrative.