«وَالصُّبْحِ إِذَا تَنَفَّسَ»
By the dawn when it breathes.
Meaning: The arrival and opening of dawn are pictured as the breathing of a living being.
Grammar: Al-ṣubḥ is the object of the oath; idhā is an adverbial expression introducing the clause tanaffasa.
Rhetoric: Ascribing breathing to dawn suggests an implicit animate comparator.
Evidence and effect: Dawn does not literally breathe; the expression gives a sensory form to the gradual emergence of light.
The answer supports a rhetorical conclusion through connected evidence rather than a bare label.