I'm not sure which word is italicized, but any adjective in this sentence is going to be positive due to context clues. The sentence starts out with "the best kind of party," which already tells us that the following description will likely be positive rather than negative.
It's going from a root to something else, so it would be a carrot, because a carrot is a root. just like potatoes, beets, and other vegetables of the like.
