Which matter exists in the plasma state? a. sun b. flour c. water vapor d. carbon dioxide

Could someone me with number one you

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from