Huck goes along with Tom's crazy plans because he wants to be noticed and missed. He also doesn't want to let his friend down or disappoint him.
The meaning of this like is simply that you can’t carry every burden on your own and need help from the people around you. two are better then one
This is the bandwagon technique because they say things like "do what the rest of the country is doing" and other examples of bandwagoning.
The answer is the 3rd one.
