How to vote on an answer to a lesson?

Question

How do you add your vote if the answer to a question in a lesson is a good and helpful one? I don’t see a button next to the answer. thanks
Edit: This is to clarify my question. How do you add your vote to answers in the questions of the comment section in the lesson. Thanks.

Answer 1

You cannot do like on that question's answers Because that's not asked by someone.
There is a comment section in the lessons with up and down arrow like here in your question and in my this answer you can post your question or answers there.

Answer 2

Those are not created by a single person to vote. Those lessons are by the sololearn community. So total credit you can give to the app creater.