What four things does a tree need for photosynthesis?

The length of the path between two points is what

What volcanoes form on a divergent plate margin

17. the soil erosion pictured here is the result of what? a. harvesting renewable resources at a rate greater than the sustainable yield b. a mudslide caused by excessive rains c. harvesting renewable resources at a rate lower than the sustainable yield d. the transition between geologic eras and eons