1. Not sleeping
2. His brain cant function properly due to him being tired
3. Get some sleep or get a schedule to efficiently practice mathematics
Pls mark as brainliest
Your answer is A, hope this helps
Answer:
Tips for effective writing
Start writing early —the earlier the better. ...
Keep the essay question in mind. ...
Don't try to write an essay from beginning to end, especially not in a single sitting. ...
Write the introduction and conclusion after the body. ...
Use 'signpost' words in your writing. ...
Integrate your evidence carefully.
Explanation:
i hope this helps :)
