What is the definition of undefined?

Which of the following is an advantage of using nuclear power plants to produce electricity?

During the period from 1865 to 1898 how did the political/economic elite contain the demands of farmers and laborers for economic justice

2. explain the two different types of egyptian calendars. 3. what architectural advances did the ancient egyptians make? what impact do these advances have on our lives today? 4. what did egyptian art usually depict? how does this compare to forms of art that we see today? 5. what all was found in king tut’s tomb?