Final answer:
The stage of team building where hostilities and conflict arise as team members compete for power and status is known as the Storming stage.
Step-by-step explanation:
When hostilities and conflict arise, and people jockey for positions of power and status within a team, this represents the Storming stage of team building. The Storming stage is characterized by a struggle for hierarchy and resistance to the group's tasks. It is often where team members voice their opinions more loudly and where clashes of personalities can occur. This is a natural part of the development process in teams, where individuals begin to push against the boundaries established in the forming stage.