The former itself seems to have a few different but related uses, but generally it is often a matter of modeling.

The latter is generally that act of the intellect that draws out something from a whole. So it's kind of an opposite process, in a very loose sense. The concept "greenness" is abstracted from images (or phantasms, in classical parlance) of particulars we encounter through the senses. We never encounter "greenness" in the world as a thing, only things which are green.

Where risk is concerned, I would expect the intellect to seize on the concept through abstraction (2), but any modeling of risk would involve the use of (1).