How does paragraph 7 contribute to the development of the ideas in the excerpt?

Paragraph seven gives extra information about the main idea which is behavior and control of impulses in teenagers.

Explanation:

The article "Fear prompts teens to act impulsively - Brain activity may help explain why crime peaks during teen years - by Laura Sander presents the thesis that teenagers have an increment of violent reactions to moments of fear because of neuronal changes in their growing process and this paragraph provides the supporting evidence to this statement.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

i need with the same thing