Explanation
Verifying that users are assigned the Chat feature license is the configuration option that should be verified if agents cannot see the Chat footer component in the Service Console. A Chat feature license is a type of license that enables users to access Chat functionality, such as initiating, receiving, transferring, or ending chat sessions, sending quick texts or files, or viewing chat reports. Users must have a Chat feature license assigned to their user record in order to use Chat in the Service Console. Verified References: Service Cloud Consultant Certification Guide & Tips, Assign Chat Licenses

Explanation
Creating a Salesforce console for service and enabling the knowledge sidebar on the case page layout is a solution that can enable articles to be suggested to agents based on information they are typing into the case. A Salesforce console for service is a workspace that allows agents to manage multiple cases and interactions on a single screen. The knowledge sidebar is a feature that shows suggested articles based on the case subject, description, or other fields in the console. Verified References: :
https://help.salesforce.com/s/articleView?id=sf.console2_overview.htm&type=5 :
https://help.salesforce.com/s/articleView?id=sf.knowledge_sidebar_enable.htm&type=5

Explanation
Customer Community Plus is a type of Community license that should be used to meet the requirements of allowing customers to submit cases and see a dashboard of case resolution history. Customer Community Plus licenses are used for external users who access Experience Cloud sites and need to access standard CRM functionality, such as creating and managing cases, viewing reports and dashboards, or collaborating with other users. Customer Community Plus licenses are based on the number of named users and are suitable for frequent or high-value customers who need full access to Service Cloud features. Verified References: Service Cloud Consultant Certification Guide & Tips, Experience Cloud User Licenses