Final answer:
In a team setting, selfishness and neglect are two behaviors that one should always avoid as they can lead to a breakdown in cooperation and undermine the team's overall performance.
Step-by-step explanation:
In a team setting, two words that would describe actions you would not want to undertake are "selfishness" and "neglect". Selfishness in a team means putting your own needs or desires above the team's goals, leading to a breakdown in cooperation and potentially causing conflict among team members. Conversely, neglect refers to ignoring or not adequately fulfilling your responsibilities, which can result in your team's efforts being undermined and the overall team performance suffering as a consequence.