Which line of poetry is made up of iambs

Can someone give me the main topics discussed in english segment 2 dba ( lesson 3.09 )

According to the police officer, the car accident could not have been avoided.

Have you ever contributed to “social media outrage” (using your social media accounts to boost the anger about a contemporary issue by forwarding it, liking it, etc.) without stopping to think who might’ve originated the message or what the originator’s motives might’ve been? provide example.