Which of the following can be integrated with Google Classroom?

YouTube can be integrated with Google Classroom primarily because it allows teachers to easily share educational videos directly within the classroom environment. Educators can attach YouTube videos to assignments or announcements, stream them during class, or use them as resources for students to explore at their own pace. This integration enhances learning by providing students with visual and auditory content that can supplement traditional teaching methods.

The other options, while popular platforms, do not have the same direct educational integration with Google Classroom. Microsoft Word is a word processing software that can be used alongside Google Docs but lacks a direct integration like YouTube. Facebook and Instagram are social media platforms that do not cater specifically to educational needs and do not offer features to integrate with Google Classroom in a meaningful way for teaching and learning.