Question

complete the sentences to explain why teenagers seem like zombies at school. teens a because they have busy lives, and social media and electronic devices. teens biological clocks also make them fall asleep

Explanation:

Teens have busy lives with social - media and devices keeping them up late. Their biological clocks make them fall asleep later, so they stay up later at night.

Answer:

Teens stay up later because they have busy lives, and social media and electronic devices keep them awake. Teens' biological clocks also make them fall asleep later.