In this task, you will be shown a passage. You need to write a fill-in-the-gap question based on your understanding of the events that might be inferred from the passage. Your question should be answerable based on the passage and only have one correct answer. Show the gap in your question with a _ .

An attack of the giggles can sometimes appear at the strangest moments. Whether it's during a speech or in a meeting, helpless laughter is one of our most insightful behaviours, according to neuroscientist Sophie Scott. In a recent Ted Talk in Vancouver, Professor Scott revealed that laughter often isn't to do with comedy value, but with our relationships with others. Laughter is often used as a tool for social bonding rather than in reaction to something that has comedy value, according to UCL Professor Sophie Scott. Pictured are Prime Minister David Cameron and US President Barack Obama during a basketball gameProfessor Sophie Scott says laughter often isn't to do with comedy valueIn a conversation, the person who laughs most is usually the one talkingPeople are 30 times more likely to laugh if they are with someone elseIt also triggers brain's mirror region which explains why it is contagious
_ activates the brain's mirror regions that mimic other's actions, and she says this is the reason behind why laughing can be so contagious.