The third paragraph of the body should contain the weakest argument, weakest example, weakest illustration, or an obvious follow up to the second paragraph in the body. The first sentence of this paragraph should include the reverse hook which ties in with the transitional hook at the end of the second paragraph. The topic for this paragraph should be in the first or second sentence. This topic should relate to the thesis statement in the introductory paragraph. The last sentence in this paragraph should include a transitional concluding hook that signals the reader that this is the final major point being made in this paper. This hook also leads into the last, or concluding, paragraph.
The passive voice is used much more frequently in academic writing than in most other writing, but neither of the active sentences you ask about here are particularly academic, which is why the passive forms are a bit odd. If there's a particular field that you are training to write in, I'd suggest you read articles in that field to look for how the passive is used. Look at when it is used and when it is not. If you have questions about their use, then you're welcome to ask us, or you might want to consider finding a class in a British Council Centre near you - I think this would be very effective.
A good definition essay is required to have a strong thesis statement in which the point of view of the author on a certain term is revealed. Ordinarily, the term is given the general basic definition implying that the dictionary definitions must be only a start for the author’s unique definition of the term. In order to make a definition essay professionally it is necessary to find a definition of the term that corresponds to the opinion of the author. The definition is always given in own words and specifies what meaning of the term is to be analyzed.