The author of a book wants to make the reader feel what the topic of book is about. for example if the book is sad, the author wants the reader to feel those emotions.
The answer is D.
"Keep", "factor", and "calculate" are all verbs in the list of things the new system allows teachers to do. The other sentences are inconsistent with their list of verbs/adjectives/nouns. Thus, option D is the only one that is grammatically correct.
I am not too good at explaining, so let me know if you are still confused.
Hope this helps! :)
If the mother goes to the capital to give her speech she would take the kids with her or leave them at home
It’s not , it’s just extra work tbh . - joke
homework’s helps us stay focused on school , prepare for our future careers and more . also gives us something to do at home instead of simply just being lazy .