Although circumstances and technological advances may be new within eras of history,1)new toys create new understandings and attitudes.2) hopes and fears are changed within each era due to the new technologies.3) fear can dominate lives.4)people are still people, the same on the inside.

Although circumstances and technological advances may be new within eras of history: 4)people are still people, the same on the inside.

This mean that regardless of the technological advancement/development that occurs in each era, people are still drives by the same psychological factors.

For example, greed and violence still lead to war , incentives still lead to efforts, people still more prone to treat people well if they feel that they are treated well,etc.

post the grid otherwise i cant .

also it sounds like a math question not history.

c. the dred scott v. sandford case,