Teaching and learning are closely related terms, and, in the teaching-learning process, the teacher, the learner, the curriculum, and other variables are organized in a systematic way to obtain pre-determined goals.The objective of the teaching-learning process is to enable students and teachers to create and manage learning situations that provide effective learning experiences in extension and development work. The great task of the extension teaching-learning process is to help students to gain a clear vision of what can and should be done for knowledge and development. Errors in the teaching-learning process:Error: The definition of an error is a mistake or the state of being wrong.Example: when you add 2+2 and get 5. ?Errors build problem-solving and critical thinking skills.Errors remove boundaries created by the fear of failure.Errors analysis helps learners to create connections between ideas and concepts.Errors analysis help teachers to understand the weak lesson of the students so that they can improve them by applying different teaching-learning methods.So by all these, we can conclude that errors analysis is relevant for students as well as teachers. Hence option (4) is the correct answer.