An output is a tangible or intangible deliverable of an activity, while an outcome is a result for a stakeholder enabled by one or more outputs1. A service provider produces outputs that allow customers to achieve outcomes2. A service consumer utilizes the outputs and benefits from the outcomes2.

The purpose of the monitoring and event management practice is to systematically observe services and service components and record and report selected changes of state identified as events1. This practice helps to identify and prioritize any issues or opportunities for improvement in the delivery or support of services2. The other statements describe the purposes of different practices: incident management (A), service request management (B), and change enablement (D)3. References: ITIL Foundation - ITIL 4 Edition, page
14; ITIL4 - A Pocket Guide, page 31; ITIL4 Practice Guide: Monitoring and Event Management, page 7.

Reference: https://advisera.com/20000academy/blog/2019/06/17/sfia-and-itil-a-winning-combination-for-it- businesses/