The similarities between the governments in Brazil and the United States from the options you provided are:
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A president heads the executive branch: Both Brazil and the United States have a presidential system of government where the president serves as the head of state and government.
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Each political party selects a presidential candidate before the election: Both countries have political parties that nominate candidates for the presidency through primary elections or conventions.
The other two statements:
- Voting is required by law: This is true in Brazil, where voting is compulsory, but it is not a requirement in the United States.
- The judicial branch appoints members to the legislature: This is not accurate for either country; in both Brazil and the United States, the legislative branch is elected by the citizens, not appointed by the judiciary.
So, the correct similarities are the first two options.