Absolutely right! (I said it was an easy one!) As for the others:
Charity: all ants have a 'second stomach' or 'crop' in which they store a small amount of food that is specifically for friends. If another ant is hungry, they simply approach a fellow and tap a request using their antennae and the other and will obligingly... er... vomit in their face.
Farming: not only do some species of ant conduct livestock farming by caring for herds of aphids, ferrying them around to prime feeding sites and 'milking' them of a sweet substance called honeydew, but there are leafcutter ants that collect and compost leaves so that they can be used for cultivating nutritious fungi.
On-the-Job Training: Yep. Can't really elaborate on that one much.