His did european nation form alliances in the early 1900s

To promote peace by creating powerful combinations that no one would attack.

A

Explanation:

the question is why did European nations form alliances in the early 1900s?

And the answer in edge 2021 is A- they were unsure they could protect themselves if attacked by larger nations.

worcester v. georgia, legal case in which the u.s. supreme court on march 3, 1832, held (5–1) that the states did not have the right to impose regulations on native american land. andrew jackson refused to enforce the ruling, the decision form the basis for most subsequent indian law in the united states.

i think the answer is the one about environmental and social health.

hope this