Irony represents a situation where one says something but means the opposite of what he she says. It can also represent a situation where the opposite of what is expected
came to class
very
current story and goes back to part events.
In short Irony is a figurative speech used to tell issues in an opposite manner to the issue
what has been done.
Topic sentence-
Concluding Sentence

Topic sentence - Irony represents a situation where one says something but means the opposite of what he or she says.

Concluding sentence - In short, irony is a figurative speech used to tell about issues in an opposite manner to what has been done.

Explanation:

You have not provided the complete paragraph and some sentences have become a bit confusing, but I can answer your question anyway.

The topic sentence is the most important sentence of a paragraph. It summarizes what the rest of the paragraph will be about. It is usually its first sentence. Here, the topic sentence is also the first one: Irony represents a situation where one says something but means the opposite of what he or she says.

The concluding sentence shows us that the paragraph is ending. Its purpose is also to summarize what the paragraph was about. The concluding sentence of the given paragraph is the last one: In short, irony is a figurative speech used to tell about issues in an opposite manner to what has been done.

"throngs rushed to the coastal area near the airport from which the plane had taken off, overloaded with relief supplies clemente wanted to make sure reached the victims of an earthquake in nicaragua."