Which sentence has an intransitive verb?

some people bring snowboards to the ski slope

the ski patrol sick or injured skiers

many winter sports require balance and agaility

winter storms arrive suddenly in the moutains

What structure does the poet employ in the first stanza of "the second coming"? a) he gives examples that point to a problem of lost innocence in modern society. b) he warns of an effect that results from avoiding traditional customs. c) he compares and contrasts innocence and violence. d) he argues that society promotes its problems.