The features that isolate ancient China from other civilisations is by physical features of ancient China as well as The Gobi Desert and the Himalayas Mountain Range isolated China from other civilisations around the world.
B. false 68% of the population live in the least industrialized nations
This is a non-binding, collaborative arrangement among its members that provides a legal framework for states to assist one another in managing a disaster or an emergency that has been declared by the government of the impacted state. This mutual aid agreement is EMAC or Emergency Management Assistance Compact.