"the book that I liked best" is the complete subject clause because it replaces the subject (the proof is that it agrees with the verb was). The adjectival clause is then "the one about the big fish" because it describes the subject in more detail (which is always the function of the adjective).
Answer:
Giving a helping hand to anyone or charity work
Explanation:
Helping your community can be narrowed down to a bunch of things but it is really just doing a good deed. So let's say that a elderly lady is putting groceries up by herself, you then offer to help her. But you can also be present in community events like a fundraiser or carnival or anything.
