Cite three conditions that gave rise to the labor union movement in the 19th century

The conditions that gave rise to the labor union movement in the 19th century are as follows:

1. The increasing numbers of workers that were forced to work in overcrowded and adverse circumstances.

2. The conditions were frequently dangerous, hours excruciatingly long and pay abysmally low.

3. Unions demanded higher pay, safer practices and limited work-weeks. 

Shouldn’t there be a graph?