You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Article: Homework can put you in a badmood , and that might actually be a good thing. Researchers from the University of Plymouth in England doubted whether mood might affect the way kids learn. To find out the answer, they did two experiments with children. The first experiment tested 30 kids. Someshapes were hidden inside a different, larger picture. The kids had to find the small shapes while sitting in a room with either cheerful or sad music playing in the background. To test their mood, the scientists asked the kids to point to one of five faces, from happy to sad. Children who listened to cheerful music tended to point to the smiley faces while the others pointed to the unhappy ones. The researchers found that sad kids took at least a second less to find the small shapes. They also found an average of three or four more shapes. In the second experiment, 61 children watched one of two scenes from a film. One scene was happy, and the other was sad. Just like in the first experiment, kids who saw the sad scene acted better compared to the others. The researchers guessed that feeling down makes people more likely to focus on a problem or difficult situation. Not all scientists agree with them, however. Other studies argued that maybe, that cheerful music in the first experiment distracted kids from finding shapes. While scientists work on finding out the answers, it still might be wise to choose when to do your tasks according to your mood. After eating a delicious ice cream, for example, write an essay.
Answer: whether mood affects their learning ability
Solution: Researchers did experiments on kids in order to find out _ .
Why? It is clearly mentioned in the article that to the check effect of mood on children is the main purpose of the experiment.

New input: Article: A few days ago, I was sitting in a Thai restaurant enjoying a meal when I got on a phone call from a friend I hadn't spoken to in a long time. In my enthusiasm and excitement, I talked quite louder than usual voice and in Spanish, my mother tongue. A few minutes into the call, an old lady sitting at the table beside mine got up, seemingly offended, and asked the restaurant staff to relocate a table as far away as possible from this man who seemed to be impolite. I sank in my seat out of embarrassment. I ended the call soon afterwards and felt the urge to apologize. Before getting up, I looked around to see where she was and she was at the table farthest away from me. I noticed that the lady was alone and staring out the window. I found a tinge of sadness or anxiety and perhaps a desire for aloneness and peace. But I had obviously destroyed it minutes earlier. Right then I abandoned my plan for a conventional apologetic gesture. Seeing those funny smile cards in my wallet, I took one out and wrote some words to express my apology. On signing my restaurant bill, I asked a waiter to secretly charge the lady's meal to me and hand her the smile card instead of her bill. Did she take it the wrong way, I wondered? Did she get confused? Did she refuse the anonymous offer? And so on. I just waited and felt nervous to learn the outcome. To my pleasant surprise, things turned out the best possible way. The waiter approached me in a joy, telling me, "In the many times she had dined here before, I had never seen the old lady smile as she did when receiving the smile card and the $0 bill. She thanked me even though I explained that someone else did the job."
Answer: the author's loud voice
Solution:
The old lady changed her seat mainly because of _ .