﴿ إِنَّا جَعَلْنَا مَا عَلَى ٱلْأَرْضِ زِينَةًۭ لَّهَا لِنَبْلُوَهُمْ أَيُّهُمْ أَحْسَنُ عَمَلًۭا ﴾

“Behold, We have willed that all beauty on earth be a means by which We put men to a test, [showing] which of them are best in conduct;”

Please check ayah 18:8 for complete tafsir.