Which is a tool or technique used in scope definition?

A company announces that is corporate strategy has changed and it will be necessary to close down a division, resulting in job terminations. However, an ongoing project for this division must be completed as scheduled. Knowing this, project team members are underperforming, and project key performance indicators (KPIs) are declining.
What should the project manager do?

Stakeholder communication requirements should be included as a component of:

A project manager is implementing an enterprise-wide software project The project has a great business impact and is fully supported by senior management However, the project manager is facing difficulties gelling the support of several key departments.
What should the project manager do?

During the first year of a three-year project, a key supplier with a long lead time stops production and closes its factory. What should the project manager do first?