Plurk paste

In the following paragraph, there are two unsupportive ideas/sentences that do not connect to the main idea presented in its topic sentence. Please find those unsupportive sentences.


Paragraph:

Science fiction is particularly interesting to the young because it involves change: changes in the level of science and technology; changes in society produced by those changes in science and technology, and changes, in human life-style and human ways of thinking produced by those changes in society. Change is a hard thing to accept. Modern people prefer staying steady in peer relationship than change in their works. We grow used to things being the way they are. We have an emotional investment in our everyday lives and we don’t want them changed. The older we are and the longer we’ve made that investment, the more we don’t want things to change and the more strongly we resist the change. But changes must take place, unless humanity falls back in complete stagnation—a condition which, to my way of thinking, would mean the end of our species. This point once again proves Charles Darwin’s insightful study of human’s evolution. The chances that take place are accepted primarily by young people, whose investment in things as they are is still small, who are newly come to the world, and who are willing to try out new things. That is why science fiction seems more exciting and less threatening to young people; why they greet it with enthusiasm. After all, it’s their world of the future that is being described.