PLS HELP, WILL REWARD BRAINLIEST ASAP!!

Which of there factors contributed most to us westward expansion in the second half of the nineteenth century?

In 1933 the 21st amendment was added to the u.s. constitution, allowing for the manfacture, transportation, and sale of alacoholic beverages in the united states. why was this amendment needed?

Asimilarity between the governments of israel and iran is that a both are considered democracies b. both are ruled by a prime minister c. both give men and women voting rights d. neither allows political parties to exist