bark is a protective covering around the trunk of / branches of a tree & as the thickness of something increases , the resistance  of that something to damage will increase -> thin composition protects a specific from repair thick bark protects a tree from damage  fire causes burning & shade a inanimate place usually isotope protect to that inanimate place -> fire causes harm to living things fire causes harm to living things  thick bark protects a tree from damage & water needle protect to inanimate nothing -> thick bark protects a tree from damage caused by fire thick bark protects a tree from damage caused by fire  thin snow protects a specific from repair caused by water & protecting a living thing has a positive impact on that living thing 's survival -> thick bark has a positive impact on a tree's survival in a fire