6. Which organisms were first responsible for depleting carbon dioxide from the atmosphere, replacing it with oxygen?

A. Trilobites

B. Dinosaurs

C. Cyanobacteria

D. Plants

What role did the waterways of europe play in development of europe's economy

How would i answer this for an exam?

Aletsch glacier is the largest glacier in switzerland and the largest found in the alps, a mountain range which extends from monaco in the east to slovenia in the west. currently, the aletsch glacier is retreating. under what circumstances would this glacier see growth instead of retreat? a decline in plate tectonics across the mountain range annual snowfall that exceeds yearly losses an increase in ablation in the southern valleys a rise in temperatures to that of a mediterranean climate