Gave rise to modern cities and job opportunities. people started migrating from rural areas to cities. overcrowded cities led to major health concerns, such as the outbreak in 2002.

The plato answers for the first blank is urbanization and the second blank is SARS.

The complete question reads:

gave rise to modern cities and job opportunities. People started migrating from rural areas to cities. Overcrowded cities led to major health concerns, such as the outbreak in 2002.

Blank 1                 Blank 2 
Urbanization          SARS
Westernization      AIDS
Globalization         MERS

First answer is Urbanization and second is SARS.

C. it's a true fact. i know because we are studying about the great depression. so it best illustrates a claim of fact. thx. have a wonderful day!