{ 1 } - True
{ 2 } - False

This is what Aquinas says. There are two problems here. First, not all good things are sought after by all humans, let alone by all things. So it seems better to define "good" as "what we (humans) ought to seek after." Second, if we define "good" in terms of what in fact is sought after, we can't derive a norm about what ought to be sought after. We can avoid these problems by cleaning up Aquinas's definition and norm to become:

Definition: "Good" means "what we ought to seek"; "evil" means "what we ought to avoid."
First precept of natural law: We ought to seek good and avoid evil.