Why did the women’s song focus specifically on the drowning of the horses?

This source-based Torah study examines the question: Why did the women’s song focus specifically on the drowning of the horses? The canonical Hebrew article develops the issue through the weekly Torah portion and the sources cited there. This localized discovery layer preserves the question and the source identity; it does not add any new halakhic, medical, legal, scientific, historical, theological, or empirical ruling or claim beyond the canonical Hebrew source.