The topic is up to you - pick a topic related to natural (geological) or anthropogenic
geomorphology (Anthropocene landform) that you are interested in and want to know more about. It should be narrow enough that you can treat the subject in depth, but not so narrow that you cannot find several references. Almost every chapter of the textbook is a source for topics. I expect you to read outside sources (books, articles, information from the web) and use these to develop your topic. Your topic is Himalayas Mountains