What are the subject and the object of the following sentence? The repairman worked on the computer yesterday.

Every sentence should have a subject and an object in it. In this sentence, the subject of the sentence is the repairman and the object is the computer.

Identify primary, secondary, and tertiary economic activities that create developmental change within a country.

The primary factor could be the production of raw materials or natural resource extraction like agriculture. The secondary activity could be the processing of natural resources. Finally, a tertiary resource is the provision of services like transportation and healthcare.

How did the African American civil rights movement of the 1950s and 1960s address the failures of Reconstruction?

I do not believe that reconstruction, as an idea, was not a failure for African Americans, it was its repeal that failed them. First, it was the social constructs that were formed at the end of reconstruction that makes it seem as though it was a failure. There were exceptional movements done within reconstruction that assisted former slaves, but the social lives of African Americans are what was the struggle. This assisted the white people of the south to have the ability to institute Jim Crow laws. These segregated schools and public facilities and kept African Americans from serving on juries. The former Confederate states then drew state legislative districts to give rural areas more clout than urban areas and required a poll tax or literacy requirements to vote. (A voter was exempt from paying the tax or proving they were literate thru a "grandfather clause", which meant if one's grandfather could vote, then they didn't have to pay the tax or prove their literacy. Since no black men had a grandfather who could vote, they were the special targets of the law) The civil rights movement in the 1950s addressed both segregation and voting rights through direct action, court filings, and legislation. The separate but equal ruling of the Supreme Court was struck down, public facilities were integrated under the Commerce clause, poll taxes were declared unconstitutional, state legislatures were required to give equal weight to urban and rural districts, and the Voting Rights Act and equal housing act were passed. All of those actions were taken in response to the civil rights movement.