Lack of sleep affects students' ability to be alert, pay attention, solve problems, deal with stress, and retain information; _______ , teens who do not get enough sleep are at risk for drowsy driving. 

1. Additionally
2. Because
3. Due to
4. For example

1 answer

The best option to fill in the blank is 1. Additionally.

The sentence would read:

"Lack of sleep affects students' ability to be alert, pay attention, solve problems, deal with stress, and retain information; additionally, teens who do not get enough sleep are at risk for drowsy driving."

This provides a logical connection and adds further information about the consequences of lack of sleep.