In the example given, what principle of second language acquisition is Mr. Brent following?

The principle of second language acquisition that Mr. Brent is following involves allowing English Language Learners (ELLs) to express information in multiple forms. This approach recognizes that language learners may have varying proficiency levels and strengths in different areas. By permitting diverse forms of expression—such as verbal communication, visual presentations, or physical demonstrations—Mr. Brent is accommodating different learning styles and abilities. This flexibility helps ELLs to demonstrate their understanding and engage more fully with the content, as it encourages them to utilize their existing knowledge and skills while they continue to develop their language abilities. In contrast, focusing solely on a single method of expression may limit their ability to communicate effectively and inhibit their language development.