The first section is titled “American: the teenage years. What is meant by this section title? lesson: Challenges of the articles of confederation. (Khan academy)

It refers to the beginning years of America.

Explanation:

The title “American: the teenage years'' means the beginning years of America. It also refers to the days when the whole America is united and defeat of confederation. These are tough years for America because large number of people were killed in civil war and bad condition of economy. so the title refers to the years when the whole America is united.

a yes vote means: the legislature, with a two-thirds vote, could change daylight saving time if the change is allowed by the federal government. absent any legislative change, california would maintain its current daylight saving time period