In learning a language errors committed by students :

Correct option is A

helps in learning.
In learning a language, errors committed by students can actually help in learning. Errors are a natural part of the learning process and provide valuable insights into a learner's understanding and use of the language. They offer teachers a chance to understand where students might be struggling and provide targeted instruction to address those areas. For learners, making mistakes and then receiving corrective feedback helps solidify understanding and improve language skills.