Final Answer:
Harry first heard of the Room of Requirement is c) In Defense Against the Dark Arts
Step-by-step explanation:
Harry first hears about the Room of Requirement in Defense Against the Dark Arts class. In “Harry Potter and the Order of the Phoenix,” during one of their secret meetings, Dobby tells Harry about the Room of Requirement, a magical room that appears only when a person is in great need. Later, in “Harry Potter and the Half-Blood Prince,” Harry uses this information to find the room and hide his Potions textbook.
In “Harry Potter and the Order of the Phoenix,” Chapter 18, Dobby reveals to Harry that there is a room on the seventh floor that becomes whatever a person needs it to be. This information becomes crucial for Harry in “Harry Potter and the Half-Blood Prince,” as he uses it to locate a place to hide his Potions textbook. The Room of Requirement plays a significant role in subsequent events, making it an important discovery for Harry.
The Room of Requirement is a pivotal element in the Harry Potter series, providing a space for characters to fulfill their needs. Its introduction in Defense Against the Dark Arts class sets the stage for its later significance in Harry’s adventures at Hogwarts.
Correct option is c) In Defense Against the Dark Arts