North Korea?
I'm a math guy, not sure about it.
It depends onto what you are comparing it to
Paid time off is referred to as PTO. Businesses may use this term in place of vacation time, sick leave, personal leave, or other words to describe their policies about paid time off for employees.
Teotihuacan is an ancient American city and currently an archeological site in Mexico, close to Mexico City.
The city was ancient even to the Aztecs who, like us, only saw the ruins of the city (the name was given by the Aztecs and we don't know what the original inhabitants of the site called it).
Answer:
False
Explanation: Fish can't swim up the stream. Pond plants & animals would start to live there instead of stream plants & animals.