Hey i want to answer and please add a photo so i an help. When u do i will edit my answer to help u.
Editing and Proofreading I believe. Hope this helps :)))))))
A topic refers to the particular theme or subject of a sentence, essay or speech.
In other words, it may refer to the category or class of argument or consideration.
The above sentence focuses on the theme of shift time which makes it the appropriate topic of consideration.
Therefore, the topic of the sentence is shift time change
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