There is much here that can be mined into a fine writing sample. The topic is fairly subjective and something that has to be explored in a personalized manner. I don’t think that you will be able to fully grasp an answer outside your own experience. In my mind, writing about parenthood seems to fall into one of two camps. On one end would be individuals who experienced good and present parenting. These writers will formulate their own opinions on parenthood based on what was done well in their own rearing, using this as a reference point. The other side of this issue will feature those who experienced the downside of parenting. These individuals will write about parenting from the point of view of how parenting should not be. They will express elements from their own background that should have been different, committed to elements they would not repeat. You can see that the very nature of writing about being a “parent” is something that is highly psychological. We all experience some aspect of the parenting spectrum. Even those who were abandoned at the earliest of ages have something to add to the discussion about how there is a certain hole present when abandoned. I think that all of this might be something for you to consider as you pen your thoughts about being a “father,” and perhaps determine into which group you (and, by extension, your writing) would fall. This, as previously mentioned, can generate more than two paragraphs.
When you say "development" paragraphs I assume you mean the same thing as "body" paragraphs.
I'm going to encourage you to do some brainstorming before you do anything.
Answer the following questions to get you started - make lists if you have to:
- What does being a father mean to you? Are you a father? Do you have a father? Write about either. (It would obviously be easier if you are a father - you could simply write from experience. If you are not, write about your own father or a father-figure in your life.)
- What does a father have/do that a mother doesn't?
- What are a father's responsibilities and why?
Hopefully these questions will spark a long list of ideas about "being a father."
Once you've brainstormed TONS of ideas, organize them into two or three categories. These will become your development paragraphs. I'm not sure what your professor is asking for as "proof" but it seems that this is a personal experience or observation type essay. I encourage you to avoid writing in hypothetical ideas - but instead to try to tell real life stories - yours or others.