Please choose the item that best represents ways in which classification might be used?
1) For discovering life on Jupiter, for preferring Neil Young to the band Alabama, or for avoiding rattlesnakes while changing a tire
2) For breaking bad news to your sister, for being your mother's favorite, or for telling your brother that he came from Uranus
3) For organizing grocery lists, for categorizing types of music, or for presenting scientific findings clearly
4) For traveling safely over railroad tracks, for avoiding hitting pedestrians, and for using hand signals