Discussion 1In Chapter One you learned about several human development theories, including psychoanalytic, cognitive, behavioral and social cognitive, ethological, and ecological theories. Many professionals take a holistic approach, but it is common to favor a particular theory. Which of the theories covered in this chapter do you believe is most valid? Explain your answer and support it with material from the text, real-life observations, and/or studies or outside reference material from a valid source.DISCUSSION 2 You must choose one of two tracks for this assignment. Refer to the Tracks and Topics for the Final Project document and select a track and a topic within that track that you would like to focus your final project on. Choose your track and topic thoughtfully, as you will not be able to switch your track and topic once chosen. Don’t worry if you are not familiar with the tracks or topics at this point in the course; you will be learning much more about them throughout the term. Contact your instructor if you are having any trouble choosing your track.You will use your selected track for Modules Two and Three as well. The track you choose determines the articles you will review to find a research gap and to inform your idea for a research design for your final project. You must use the same track for the entire course.For this assignment, you will complete the ‘Article One’ section of the literature worksheet and submit it to obtain instructor feedback. This assignment is graded pass/fail.Here is an example of a completed literature worksheet and a Final Project Milestone One: Literature Worksheet: Article One introduction video to assist you in completing this assignment attach belowTEXTBOOK INFORMATION SANTROCK: A Topical Approach to Life-Span Development9th Edition