A muckraker is a journalist who devotes their work to uncovering topics that might be overlooked or ignored by the powers that be. That said, a muckraker is D a writer who exposes unsafe working conditions.
Upper Mantle layer is what produces magma that causes sea floor spreading and volcanoes. :)
Answer: The 1960s were a decade of revolution and change in politics, music and society around the world. ... The 1960s were an era of protest. In the civil rights movement blacks and whites protested against the unfair treatment of races. Towards the end of the decade more and more Americans protested against the war in Vietnam.