Which system is responsible for the exchange of oxygen and carbon dioxide? respiratory endocrine skeletal circulatory

Ibelieve it is the 2nd answer, create gardens on all rooftops. let me know if this .

The war began as a fight between mayans and the landowners of the country. the main causes of the guatemalan civil war was started by the greed of the united fruit company, the fear of communism, and the racism toward the  mayan  people.

i didn’t understand your question but archipelagos are groups of island hope this