Which of the following statement can be used as a conclusion from fig. 2, “the effect of sulfur dioxide pollution on the lichen coverage on trees”?

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).

a symbiotic relationship with the mitochondria