The Qur’anic treatment of oath expiation offers a clear illustration: several available actions are named, but the wording does not demand all of them together.
«فَكَفَّارَتُهُ إِطْعَامُ عَشَرَةِ مَسَاكِينَ مِنْ أَوْسَطِ مَا تُطْعِمُونَ أَهْلِيكُمْ أَوْ كِسْوَتُهُمْ أَوْ تَحْرِيرُ رَقَبَةٍ»
Its expiation is feeding ten needy people from ordinary family food, or clothing them, or freeing a slave.
In this excerpt from Qur’an 5:89, aw links alternatives. It illustrates the choice function of the particle; the complete law of expiation contains additional conditions beyond this linguistic lesson.