Question

____ and poor, working-class citizens were the heart of the mexican revolution.
answer input:
spelling counts but capitalization doesn’t.
the mexican revolution
feedback:
incorrect. the mexican revolution revealed the power of these two working classes. try again.

Explanation:

The Mexican Revolution involved two main working - class groups: peasants (or rural workers) and urban workers (the poor, working - class citizens mentioned). The key here is to identify the other group that, along with the poor working - class, was central to the revolution. Peasants were a crucial part of the Mexican Revolution, as land reform and agrarian issues were major drivers. So the word that fits in the blank is likely "Peasant" (or "Peasants", but since the structure is parallel to "poor, working - class citizens", "Peasant" (adjective - like) fits.

Answer:

Peasant