Which branch of government decides wether or not laws are constitutional

Which german count invented the zeppelin

Which best describes the connection between a mechanical loom and a cotton gin

Question 4 which of the following is an example of libel? a. an anti-war supporter advocates overthrow of the government. b. a writer for the washington post maliciously prints false information about a lawyer c. a politician screams obscenities at a reporter on the air. d. a person sets up a flag burning demonstration.