The Lord speaks to Job about the wild donkey who lives and thrives in a desert far from human beings. This seems rather out of place until we realize God is saying that He takes care of His creatures in all situations, no matter how desolate. It is a comfort for Job to know God still looks after him in his present condition.
There is another theme present, though, which is God delighting in His creation as it exists independently of humans. All things were not created for human delight but for God to delight in them. There is value in animals, plants, and inanimate objects aside from humans will attribute to them. Even Adam and Eve were to take care of animals and plants in Eden at the beginning. Our original vocation is to take care of the creation. Therefore, we should care for animals, plants, and the environment not just for our benefit but for the benefit of everything else in creation.