There is no correct answer here it depends on your body and how fast your motabolism is.
Reduce carbon dioxide emissions, pollution, and deforestation
reuse materials rather than throwing them away and needing to create more
recycle materials like metals, paper, and plastics
replace non-biodegradable materials with biodegradable
solar it takes up the least amount of space and causes no pollution also it is unlimted
The answer is a because i took it on k12