How does human error change the way humans complete research and other activities? it leads to events like droughts and famine in different regions of the world. it leads to beneficial discoveries such as penicillin, which has saved the lives of many people. it leads to scientists repeating mistakes in their experiments to make sure that they were wrong. it leads to accidents like the challenger explosion, which changed the way space shuttles are built.

the labor movement in the united states grew out of the need to protect the common interest of workers

for those in the industrial sector organized labor unions fought for better wages reasonable hours and safer working conditions

  in the 19th century trade unionism was mainly a movement of skilled workers.

hope this

states

explanation:

as the old saying goes, all politics are local. state and federal governments affect our daily lives in numerous ways. yet, in our federal system, there is supposed to be a balance between federal and state power. as james madison envisioned it in federalist no. 51, “the power surrendered by the people” would be “divided between two distinct governments,” creating a balance of power that would enable the “different governments [to] control each other.”

the main reason the us senate rejected the treaty of versailles was because "european nations wanted to punish germany"

d(:

me and mark as brainliest.