Ken looked in his backpack to find his camera but it wasn’t there, he walked back to the cafe to make sure that he didn’t keep it on the table, he entered the cafe and the camera was nowhere to find, he asked the waitress who served him if she took it but she said “you took it with you when you walked out” then he remembered that he went to a ice cream seller next to the beach that he walked past, He ran to the ice cream seller and asked him if he left it somewhere, the ice cream seller said “yes you took it out to take pictures of the ocean” then Ken remembered that he gave it to someone to take a picture of him next to a famous guy that was in the beach, Ken looked around and couldn’t find the guy who took the camera, ken thought to him self that when the guy took a picture of them together he ran with the camera and Ken did not notice it because he was surprised that he met a famous guy. He called the police to help him out with this situation and they asked him to remain calm while they find it around the area.
I believe the answer is: "Resistance to civil government (Civil Disobedience)"
The main idea of the civil disobedience is to advocate the people to not ever let the government overrule their conscience .
He pointed Mexican–American War as one of the example because he perceived the war as an act of injustice for the people of Mexico.