Most countries today operate under which of these economic systems?

Which age groups shows the graestest diferrence between males and females

Which characteristics of temperature and salinity have the greatest influence on the movement of deep-ocean currentsa. warm and low salinityb. cold and high salinityc. cold and low salinityd. warm and high salinity

What is one early technological advance that shaped culture? a the use of fire b the discovery of arable land c family units. d migration