Hi Orukami,
Personally, I slightly disagree with TSEtuition's answer - a
to what extent question should not only be how the statement is true to a certain point but should also consider both perspectives of the text to inform the reader of the nuances within the text. For example, a "nuanced" and "discerning" thesis would look like:
Hence, despite Shakespeare’s “positive” narrative of human behaviour in
The Tempest, Atwood takes a more pragmatic approach to the representation of grief and trauma. For example, Atwood mirrors the readers’ social and psychological milieu to construct how the characteristics of vengeance, power and metaphorical “imprisonment” will always characterise human behaviour.
Of course, since I'm assuming that you are only one text, your thesis would look a little bit different but do you notice how I addressed the varying perspectives of the original base text and the rewritten version, rather than just one? It's just these little details that can help you improve your essay from an "average" mark to "discerning" mark as complexity (to an extent as you need to find a balance between complexity and simplicity) is an extremely important feature of any type of essay.
However, when you are provided with a quote-based essay prompt, I would advise you to use the quotation provided as since the essay prompt is structured around your specific quotation (as well as the to-what extent) perspective, it would be an extremely integral part of your essay. For example, the quotation should assist you in constructing your thesis, points and overall arguments in one way or another. You don't have to necessarily agree or disagree with your quotation, but it is important to consider how this particular quotation affects the "shape" and "flow" of your analysis and argument. Furthermore, I would recommend that you should integrate the quotation into your introduction and frame your analysis and points around this quotation (how this specific quotation affects the plot, characters, relationships between the characters, themes etc.). Then I would reference (not quote word for word) your quotation at the end of each paragraph to connect back to your thesis, and then, I would use the quotation in the conclusion to summarise your essay.
Hopefully, this helps

But of course, if you do have any other questions, queries or concerns, please don't hesitate to message me as I would be more than happy to help!
Have a great week and kind regards,
Darcy Dillon.