Question

click to correct the two capitalization errors. by urban population, mexico city, the capital of mexico, is the largest city in north america.

Explanation:

1. "mexico" is the name of a country, so it must be capitalized to "Mexico".
2. "North america" is the name of a continent, so "america" must be capitalized to "America" to form the proper noun "North America".

Answer:

By urban population, Mexico City, the capital of Mexico, is the largest city in North America.