I will mark brainliest. pls help my grade depends on this
Why are rivers and oceans both barriers and roadways?

Explain the connections between North and South America.
Compare and contrast the Amazon and Mississippi rivers
Evaluate the effect of physical geography on human culture.
Identify the major geographic and cultural features of Central and South America.

Needed fast 15 points the process of natural selection favors certain characteristics in organisms, while it selects against other characteristics. what would happen if there was zero variation between all of the organisms on earth? a.organisms would evolve to increase variety b.natural selection would operate faster c.less food would be available d.evolution through natural selection would not occur

What factors led to europe's global dominance in economic and political factors? what impacts did that dominance have on other peoples and environments?

Lines of longitude are like stripes from the top of the globe down to the bottom virtually slicing the earth like an orange