Passage 1阅读短文，回答问题。
Children know that summer is probably the most fun of all seasons. However, experts say it is also the most dangerous, especially, for children aged 14 and under. In its first study of children’s safety in the US, the National Safe Kids Campaign(NSKC) founds that nearly half of the injury-related(与受伤相关的) deaths among children happened in summer.
Experts are not surprised by the study’s results. They always know summer is a dangerous season for children. During the summer, children are out of the school and spend more time outdoors. They are more likely to get into an accident or be injured. “While we encourage children to be active and spend more time outdoors, they need to understand the importance of safety,” said Everett Koop, an expert of the NSKC.
To help children say safe, the NSKC started a “Make it a Safe Kids Summer” campaign during National Safe Kids Week, from May 5 through May 12. Here are some important summer safety tips from the NSKC:
●Always wear your seat belt.
●Make sure there is an adult around when you decide to go swimming.
●Wear a life jacket when on a boat or doing water sports.
●Obey all traffic rules.
Why is summer the most dangerous season of the year in the US?
How long did the “Make it a Safe Kids Summer” Campaign last?
How many summer safety tips does the NSKC provide?
Must the children understand the importance of safety?
What’s the purpose in writing this passage