In writing, the topic refers to the thesis of a given text. or in other words, what a certain text is about. On the other hand, subtopics constitute part of the topic or main subject, which are often discussed in different paragraphs.
Considering the described above, three subtopics for the general topic happiness could be personal realization, professional realization and leisure time, which can be considered as a part of the topic of happiness.
it about a duaghter
explanation: sorry thats all i could give i cant see the passage really