Think of it like this
Internal: A force inside yourself
External: A force outside of yourself
So if there an external force, it’s a force from outside so an example would be bullying. You wouldn’t want to go where you are being bullied so that would be an outside force affecting you.
Etymology .studying of the history word dictionary
Answer:
1st part -- "in the palace"
2nd part -- "to an old tower"
Explanation:
"in the palace" reveals that she's actually in the palace (at first)
"to an old tower" reveals that she's then goes to the actual old tower, where she finds that old lady there
these two parts helps readers know that so far, she's not gone out of the palace, such as to the forest