This answer lists audiences, scope, inputs, outputs, and resources as the key attributes that the BA should look for when reviewing the process maps. These attributes help to define and understand a business process, and identify its purpose, boundaries, stakeholders, data, and resources. These attributes also help to evaluate the effectiveness and efficiency of a business process, and identify areas for improvement or optimization.
References: https://trailhead.salesforce.com/en/content/learn/modules/salesforce-business-analyst-quick-look
/use-process-mapping-to-understand-your-business

Explanation
A user story is a type of documentation that describes what functionality a system should provide from a user's perspective. It is written in simple language that anyone can understand and follows a standard format of "As a [user role], I want [functionality], so that [benefit]". A user story helps to capture the user's needs and expectations from the system and provides a basis for developing test cases and acceptance criteria. A BA should use user stories to document the functionality that a system should provide so it can be developed into a work item. References:
https://trailhead.salesforce.com/en/content/learn/modules/business-analysis-user-stories/write-user-stories

Explanation
The tool that the business analyst should use to help uncover any technical constraints or potential problems in a Salesforce implementation is Salesforce Optimizer. Salesforce Optimizer is a feature that analyzes a Salesforce org and provides recommendations for improving its performance, security, usability, and maintenance. It can help the business analyst identify any issues or risks in a Salesforce implementation such as unused features or components, complex configurations or customizations, low adoption rates or user satisfaction scores, etc.Setup Audit Trail is a tool that monitors and logs changes made by administrators in Setup. It can help the business analyst track who made what changes and when, but not uncover any technical constraints or potential problems in a Salesforce implementation. Reports and Dashboards are tools that display data or metrics in visual formats such as charts or tables.

Explanation
This answer states that gathering requirements and analyzing them is the first step in the Application Lifecycle Management (ALM) process that should be taken for adding a custom field to a page layout in a sandbox for Universal Containers. ALM is a framework that defines and manages the stages involved in developing, testing, deploying, and maintaining a software application. ALM typically consists of these steps: gather requirements and analyze them, design and build solutions, test solutions, deploy solutions, and maintain solutions. Gathering requirements and analyzing them means that the BA identifies and understands the business needs and expectations of the stakeholders or users, and defines what the solution must do or have to meet them.
References:https://trailhead.salesforce.com/en/content/learn/modules/application-lifecycle-and-development-mod