Final answer:
The ILO core labor standard from the given options is the prohibition of child labor, which is designed to safeguard children from harmful work.
Step-by-step explanation:
The core labor standard of the International Labour Organization (ILO) from the options provided is the prohibition of child labor. Child labor is prohibited under ILO conventions, which are aimed at protecting children from work that is dangerous or might hinder their education, or that is harmful to their health or physical, mental, spiritual, moral, or social development. Other standards include setting minimum hourly wages, regulating health and safety conditions in the workplace, and preventing discrimination. Notably, workers' right to strike is also recognized by the ILO as a fundamental right, although it is not specified in the list as a core labor standard.