Final answer:
The correct words to complete the sentence are 'Replacement', which is the text that will replace the regex matches, 'discard', meaning to ignore these matches, and 'references', which are the specific items being discarded or modified during deployment using YAML.
Step-by-step explanation:
The text that should replace the content found by the regex expression is referred to as the "Replacement". Leaving this parameter blank will result in Copado discarding the matches it finds from the profiles and permission sets. Specifically, it will remove the references to user permissions, which means these won't be part of the deployment package. When a permission set is updated in this way and deployed, the absence of the references means the access level will default to false. Consequently, the YAML file will execute and Cubado will select all instances within the file(s) that match the defined pattern. Therefore, the correct replacement words to fill in the blanks in the student's question are Replacement, discard, references, YAML, placeholders, condition.