Answer:
Social phobia
Step-by-step explanation:
Social phobia occurs when a person has irrational anxiety when they engage in social interaction.
The condition expresses itself when a person worries about embarrassment or humiliation when relating with others.
I'm the given scenario Susan is doing well in other topics where she does not need to interact with other people.
However I'm her speech class when she wants to present she will start shaking and sweating, her voice would quiver and then she would completely lose her train of thought.
This is a social phobia