Under what conditions is an organization likely to prefer (a) a mechanistic structure, (b) an organic structure, or (c) elements of both?

Can you help me understand this Management question?

The writing assignment must identify the question you are answering followed by the actual question itself (in bold type), Use a standard essay format for responses to all questions (i.e., an introduction, middle paragraphs, and conclusion), Double-spaced, using a standard font (Times New Roman) and 12 point type size, The paper will be evaluated on my ability to present a well-organized and developed response that is clear in its presentation of the course material. The presentation must be based on the course textbook. For maximum credit, you will also need to include outside sources. Must be between 500-700 words.

The class is Organizational Theory. Text book is Organizational Theory, Design, and Change Gareth R. Jones, 2013 Pearson ISBN.13: 978-0-132-72994-9