Which study is best for examining the lifespan of twins who grew up apart? longitudinal study observational study cross-sectional study correlational study

What volcanoes form on a divergent plate margin

Countries trade with each other because resources are not evenly distributed across the globe. true or false

Plz answer ! find the alps. what countries and country borders intersect this major mountain range? which borders seem to be defined by the edges of the mountains? which borders seem to be defined by the edges of the mountains? which borders cut across the mountains?