The use of sod homes on the great plains was made necessary because of what reason

Poverty and lack of building materials, is the correct answer.

Explanation:

The Sod houses were used by the settlers in the plains of United States and Canada. It was used for animal shelters. The sod houses were constructed as the standard building materials such as wood and stones were not available in the prairies. The first settlers were poor so instead of purchasing construction materials they used prairie grass for constructing the houses. Prairie grass is long and have thick roots.  The patches of grasses were used in building the walls and these houses were vulnerable to rain damage.

alliances in ww1 were different from ww2 because the entente in ww1 made up of serbia,russia,france,britan,japan and italy later america  and all allied in a sort of balance of power and too keep germany,austria-hungary,and the ottomans down. russia allied the serbians in order to exert its influence in the balkans while france allied the russians because france was still in dismay and insulted after the defeat to the germans during the unification of germany and britian allied the belgians after the germans invasion of belgium.in ww2 the alliances were in a preemptive attempt to deter any further wars into happening while germany and italy allied since they were insulted and humiliated after the previous war while also sharing a similar ideology of facsim along with japan which all 3 had a want for world domination and agreed to assist one another in the endevours 

explanation:

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