Denitrifying bacteria . are part of the carbon-oxygen cycle absorb oxygen from the atmosphere
release nitrogen into the atmosphere
break down nitrogen into ammonia WILL MARK BRAINLIESST TO RIGHT ANSWER ​

Explanation is in the file

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halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.