Answer: loyalty.
Step-by-step explanation: a noun is a word, other than a pronoun, used to identify any of a class of people, places, or things, or to name a particular one of these. An abstract noun is a noun denoting an idea, quality, or state rather than a concrete object. In the given sentence we can see an example of an abstract noun in the word "loyalty" because it is denoting a quality of the team members.