* Inherited traits are passed down from parents to offspring through genes.

* Learned behaviors are acquired through experience and observation.

Let's look at the options and determine which is most likely inherited:

* A fear of cats: While a field mouse might learn to fear cats through experience, this fear could also be influenced by inherited instincts.

* The ability to run quickly: This is a physical characteristic directly linked to its genes and likely inherited from its parents.

* A preference for certain types of seeds: This could be influenced by both genetics and learned behavior. A mouse might inherit a predisposition for certain seeds but refine its preference based on what it finds most readily available.

* A specific nesting site: This is a learned behavior, determined by the mouse's own exploration and needs.

Therefore, the characteristic most likely inherited from its parents is the ability to run quickly.