What will be used for ensuring learners engagement?

Discussion is often used for ensuring learners' engagement as it encourages active participation, critical thinking, and interaction among students.

Key Points

• Discussion provides an opportunity for learners to express their thoughts, ask questions, and engage with the material more actively.
• It fosters a collaborative learning environment and helps maintain the interest and involvement of learners.

Hint

• Demonstration: This can be engaging, but it primarily involves passive observation. 
• Lecture: Though it can provide information, lectures are often teacher-centered and can lead to passive listening.
• Picture Representation: Visuals can be helpful, but they alone rarely promote active participation and deeper understanding.

Hence, the correct answer is discussion.