Which automation tool in Salesforce allows for complex decision-making?

Flow Builder is the correct choice for allowing complex decision-making in Salesforce because it is designed to handle intricate business processes and decisions. Flow Builder provides a visual interface where users can create automations that include conditional logic, loops, and various actions based on user input or system variables. This enables the execution of sophisticated workflows that can adapt to different scenarios and conditions, making it highly flexible.

In contrast, while Workflow Rules and Process Builder are also automation tools within Salesforce, they are not as versatile as Flow Builder. Workflow Rules are limited to straightforward criteria and actions, making them suitable for simpler automation tasks. Process Builder does offer more complexity than Workflow Rules, allowing multiple criteria and actions, but it still lacks the comprehensive and user-friendly capability of Flow Builder for advanced decision-making with flow logic and interactivity.

Approval Processes typically focus on managing approval workflows rather than general automation or decision-making, containing structured steps rather than flexible decision trees. Therefore, Flow Builder stands out as the preferred tool for complex decision-making in Salesforce automation.