In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.

I don't know why , but I suspect it's because at night it's dark , and he has become used to falling back asleep , like we all do at night . During the day when it's light , he wakes up and can't put himself back to sleep yet . The other bad thing is that until now , I've let him take his afternoon nap in the swing , which is becoming a problem because I think he is fast approaching the weight limit ( I'm fairly certain the limit is 20 lbs , and he was 16 about three weeks ago ) . So pretty soon , there will be no swing to nap in . 
Question: What's a possible reason he can't put himself back to sleep during the day ?
Because it's too bright .

That book was about 2 inches thick and I finished it 10 minutes before I left work that day . On Tuesday after I came back , I hit the bookstore and bought the first and second books , Elizabeth loves vampire things and the set really is a series aimed at teens , and very clean , so I thought she'd enjoy them . I finished the 2nd book that night . I stopped by Wal Mart on Wednesday morning before I went to work and bought the 3rd one . 
Question: What might happen when you hit the book store ?
I would purchase a gift for a friend .

Shopping . I'm skilled at hunting out deals and saving money . Other than groceries I bought : 2 GB of USB storage , Eminem's Anger Management Tour ( love it so much ; I watched it on TV whenever I could over and over ) , a documentary about James Dean , tons of books for a dollar each because my favorite used book store is going out of business , The Warriors on DVD . 
Question: Why do I like to hunt out deals to save money ?

I get excited by bargain hunting .