Final answer:
Team failure does not increase team cohesion; instead, external challenges, member similarity, smaller team sizes, and somewhat difficult entry conditions do. Failure may lead to decreased morale and unity.
Step-by-step explanation:
The factor that does NOT increase team cohesion is e) Team failure. Cohesion in a team is strengthened by elements such as external competition and challenges, member similarity, smaller team size, and somewhat difficult entry into the team; as these factors contribute to a sense of exclusiveness, shared goals, and unity. In contrast, team failure could lead to blame, decreased morale, and possible dissolution of the team. Reference information suggests that in smaller groups, collective action problems are less severe because there is less opportunity for individuals to take advantage of being able to social loaf, and their behavior can be more easily monitored, which applies peer pressure.