Final answer:
The statement is false because, during the forming stage of team development, members focus on building relationships, not competing for roles.
Step-by-step explanation:
The statement that "During the forming stage of team development, team members become proactive and compete for various team roles" is false. This is because in the stages of team development outlined by Bruce Tuckman, the forming stage is characterized by team members getting to know each other and starting to understand the team dynamics. Team members usually behave quite independently during this stage, and the competition for roles typically happens in the subsequent "storming" stage where individuals start to push against the boundaries established in the forming stage. The forming stage is more about creating relationships and a sense of team cohesion.