Answer:
4, 2, 5, 3, 1
Explanation:
"I have seen flocks streaming south in the fall so large that they were flowing over from horizon to horizon in an almost continuous stream all day long." goes with 4 because it is a great exaggeration. Hence a hyperbole.
"As long as I live, I'll hear waterfalls and birds and winds sing. I'll interpret the rocks, learn the language of flood, storm, and the avalanche." goes with 2 because nature sings and talks.
"O if we but knew what we do When we delve or hew—Hack and rack the growing green!" goes with 5 because it has a good rhythm.
"I'm only a child yet I know we are all part of a family, five billion strong, in fact, 30 million species strong and we all share the same air, water and soil." goes with 3 because it says that everyone's shares something.
"He watches from his mountain walls, And like a thunderbolt he falls." goes with 1 because it is a simile.