The "essential nutrients" for proper human nutrition include

The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen

This is the nitrogenous base only found in rna

Can yall plz me on this question im having a hard time think about it