Erie has 100 000 people, and Pittsburgh has 300 000 - so from the first two Pittsburgh is the bigger one.
Philadelphia has 1.5 million people living in it - it is also the biggest city in Pennsylvania (this is the state where all the cities are) - and this is also the correct answer!
It is not the capital however, as it's Harrisburg.
Answer:
Explanation:I forgot sorry I just need points
I would say it's the result of a slightly negative charge on the hydrogen end of water.
