Listed in the item box are individual steps that need to be ordered to find out more information about steps some have more details available when you click drag and drop the steps in proper order by placing each in his correspondent open rectangle be sure that the earlier step is placed next to the number one.
class family genus kingdom
order phylum species
1. brought in the clean air act in 1956
2. people in developing countries often do not have laws to protect the air that they breathe
d. is the answer ; d