In what way are state governments similar to the federal government?
a.
they have the power to build a military.
b.
they elect a president and vice president.
c.
they separate into three branches.
d.
they are allowed to declare war.

All state governments are modeled after the federal government and consist of three branches: executive, legislative, and judicial. The U.S. Constitution mandates that all states uphold a "republican form" of government, although the three-branch structure is not required.

They have the power to build a military., although the three-branch structure is not required.

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.

the answer to your question is,

old stone age.

-mabel < 3