The purpose of a topic sentence is to explain to the readers what the paragraph will be about.
Answer/explanation:
i mean it can be a good/positive attitude here are some examples:
Positive self-doubts can help you set personal goals or action plans.
Positive self doubts can maybe push you harder to do what you're doubting, work harder to burn body fat(if there is any), and just generally push you to finally being able to do what you're trying to achieve.
Finally, If you thing of doubt as <em>constructive, </em>to where you are telling yourself yeah, maybe i could work on this more as a person, i guess that could be another example.
that's all i got, hope it helped :)
My guess would be each quatrain develops the problem of the poem and<span>the turn (volta<span>) comes at the beginning of the closing couplet.</span></span>
I think it would be clear beginning and end, and figurative language