Final answer:
Option (1), Right Speech, Right Conduct, and Right Livelihood belong to the aspect of Moral Discipline in the Noble Eightfold Path, which guides Buddhists to end suffering and live ethically.
Step-by-step explanation:
Right Speech, Right Conduct, and Right Livelihood are part of the Noble Eightfold Path, specifically within the aspect of Moral Discipline. The Noble Eightfold Path in Buddhism is a guide to end suffering and attain enlightenment. The aspects of Moral Discipline include Right Speech, which involves speaking truthfully and kindly; Right Action, which focuses on conducting oneself in a non-harmful way; and Right Livelihood, which means earning a living in a way that does not cause harm and is ethically positive.
These practices are part of leading a moral life according to the teachings of the Buddha and are essential components of ethical conduct (sīla) on the path to enlightenment.