Natural resources are substances that exist . Group of answer choices A. without any actions of humans.
B because of human actions

A. without any actions of humans

natural resources are substances such as minerals, forests, water, and fertile land that occur in nature without human interaction.

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof

a. the astrolabe could determine the correct latitudinal location of the ship