Because of dangerous work conditions in railroad construction in the 1800s, about 100-150 workers died while building the Union Pacific railroad.
about 1,000-1,500 workers died while building the Central Pacific railroad.
about 100-150 workers died while building the Central Pacific railroad.
about 1,000-1,500 workers died while building the Union Pacific railroad.

C

Explanation:

about 100-150 workers died while building the Central Pacific railroad.

C

Explanation:

the technology changed agriculture in an impacting manner since many people left the field work by a cellular or other technological appliances

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

hope this

i am brianly

sorry if this doesn't