Why does Roosevelt believe that the entire world is indebted to the workers who built the Panama Canal. A. Other nations will get out of debt more quickly by using the canal. B. The US presence in Latin America stabilized the world economy. C. People from around the world worked on the canal. D. The canal would benefit the shipping trade of all nations

D.

Explanation:

If it's wrong sorry, I didn't really pay attition in history.

Increase in atmospheric oxygen by the photosynthetic organism to the biosphere evolved more complex forms of life. Many different plants, animals consuming plants, bacteria decomposing dead plants and animals evolved.These forms a food web in the biosphere. The remains of dead plants and animals release nutrients to the soil and ocean which are reabsorbed by the other growing plants.This food exchange  and energy exchange make the biosphere a self supporting and self regulating system .