Explain the frustrations encountered by the Rudkus family.

Their frustrations would take an awful long time to list here. I suggest you start by linking gradesaver's summary for this unit.

http://www.gradesaver.com/the-jungle/study-guide/short-summary/

you'll also want to check out the themes.....

http://www.gradesaver.com/the-jungle/study-guide/major-themes/