Q: Where's Polly?
A: She is in her room studying.
B: She is studying in her room.
Both replies gave that extra information.
But we often answer in ways that answer what we think the person really wanted to know.
If we anticipated the next question to be "What's she doing in there?" or perhaps "I need her to set the table," then the extra information provides a more complete picture.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.