Explanation
Computer is an A) Interactive teaching aid.
A computer can serve as an interactive teaching aid in the classroom. It provides a wide range of functionalities and features that can be used to enhance teaching and learning. With a computer, teachers can utilize various software programs, multimedia resources, educational websites, and interactive applications to engage students in active learning. Computers allow for interactive activities, simulations, virtual experiments, and collaborative learning experiences, making them valuable tools for enhancing the teaching process and facilitating student engagement and participation.