Answer:
she is initiating phase
Step-by-step explanation:
she is initiating phase
This is starting phase of any project in project management where all the information needed to build the project in a smooth way is collected. In these parameters like objective, future growth, future outcomes are discussed.
For the above context, sierra who is going to organized the anniversary party for her parents is at first step. she is looking for venues and another thing to manage the party well. therefore she is in the first stage of the event.