They are “animal ” in that they are the product of fleshly inclinations, similar to characteristics of unreasoning creatures.
وَهِيَ « حَيَوَانِيَّةٌ » بِمَعْنَى أَنَّهَا نَاجِمَةٌ عَنِ ٱلْمُيُولِ ٱلْجَسَدِيَّةِ ،‏ مِثْلِ ٱلصِّفَاتِ ٱلَّتِي تَتَمَيَّزُ بِهَا ٱلْمَخْلُوقَاتُ غَيْرُ ٱلْعَاقِلَةِ .‏