Which automation tool is utilized to create a Salesforce task when a prospect visits the company's pricing page?

The correct option for creating a Salesforce task when a prospect visits the company's pricing page is a completion action. Completion actions are designed to trigger specific actions based on a prospect's behavior, such as visiting a webpage, filling out a form, or taking another predefined action. By configuring a completion action associated with the pricing page visit, you can automatically create a Salesforce task, which is particularly useful for sales teams to follow up with interested prospects promptly.

In contrast, engagement studio is primarily focused on creating multi-step engagement campaigns based on rules and criteria that guide prospects through tailored paths, rather than triggering immediate actions such as task creation.

Automation rules are also important for managing and automating processes within Salesforce but are more about managing records and criteria to take actions across broader criteria or lists, rather than responding to specific instant actions like a webpage visit.

Segmentation rules help categorize contacts based on certain attributes or behaviors but do not create tasks directly or respond to immediate interactions like visiting specific pages.

Thus, for the scenario provided, leveraging a completion action is the most effective means to directly create a Salesforce task following a prospect's visit to a particular webpage.