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the question is incomplete
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Answer:
The art or practice of taking and processing photographs.
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Happy Teachers Day 2020: Top 50 Wishes, Messages, Images and Quotes to share with your teachers to make them feel special
In the wake of coronavirus pandemic, all the schools have been closed for the last few months. With online classes, students and teachers will now be celebrating Teachers' Day 2020 virtually. Every year, students prepare a speech for their teachers, to convey their wishes and gratitude. Even this year, students can prepare a speech at home, which can be performed online, during virtual celebrations. We are listing down some of the sample speeches that you can prepare this year:
I think the answer is all
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