The correct option is "1. Bug." A bug issue type is used to track defects or issues found during testing or reported by customers. It is specifically designed to capture information related to the problem, such as steps to reproduce, environment details, and severity. Using the bug issue type ensures that the issue is appropriately categorized and addressed by the development team.

The purpose of a screen in JIRA is to display issue details to users. Screens define the fields that appear when users view or edit an issue, providing them with the necessary information to understand and manage the issue effectively. Screens are associated with issue operations such as create, edit, view, and transition, ensuring that users can interact with issues appropriately based on their context.

JIRA Automation Rules allow users to automate actions based on specific events. These events could include issue creation, transition, or other changes in JIRA.

To restrict access to specific issues in JIRA, you can use Schemes. JIRA allows you to configure schemes for issue security, permission, notification, and more. By assigning appropriate schemes to projects or issue types, you can control access and visibility of issues based on user roles or other criteria.

A JIRA project is a collection of issues that are used to track and manage tasks, enhancements, and bugs related to a specific product or project. Each project in JIRA has its own set of permissions, configurations, and workflows.

JIRA provides various issue linking types. The "Relate" linking type establishes a relationship between issues across different projects, aiding in cross-project tracking.

Planning Poker is an Agile estimation technique where team members assign relative values, usually in the form of story points, to user stories or tasks based on their complexity and effort required.

When stakeholders express dissatisfaction with the functionality delivered during the Sprint Review meeting, the Scrum Team should acknowledge the feedback and incorporate it into future Sprint planning. This demonstrates responsiveness to stakeholder needs and a commitment to continuous improvement. Ignoring or dismissing feedback can undermine trust and hinder the team's ability to deliver value effectively. Embracing feedback fosters a culture of learning and adaptation within the Scrum framework.

JIRA Automation Rules primarily serve to automate repetitive tasks and workflows within JIRA. They enable users to streamline processes by automatically executing actions based on predefined triggers and conditions. This helps in improving efficiency and reducing manual effort in managing JIRA projects.

Routine system maintenance tasks for a JIRA instance include regular backup to safeguard data integrity, upgrading the software to access new features and security patches, and performance tuning to optimize system responsiveness. These tasks are essential to ensure the stability, security, and efficiency of the JIRA environment, thereby supporting uninterrupted workflow and user satisfaction.