Answer: 
Each event receives a(n) key=value pairs from Splunk. 
Explanation: 
The method by which Splunk Enterprise extracts key=value couples from event data at search time. When field discovery is approved, Splunk Enterprise: 
- Extracts the first 50 fields in the event data that match simple key=value pairs. 
 - Extracts any fields that you explicitly specify in the search. 
 - Performs custom field extractions that you define within the Field Extractor, the Extracted Fields page, configuration files, or search commands.