What is your actual question? Since the topic 'change' was a previous area of study, so are you interested in what the rubric for this previous HSC area of study is, or are you doing an area of study in school called 'change' and would like some possible insights to what the word 'change' can encompasses, or are you looking for a simple definition of 'change', or are you interested in ideas for related texts relating to the topic of 'change'?
Sorry for the many questions, but I think if you at least answer some of them, it will clarify what your question is, and it will assist all of us to help you