Although circumstances and technological advances may be new within eras of history

4) people are still people, the same on the inside.

Explanation:

According to a different source, these are the options that come with this question:

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.

In recent years, we have experienced enormous changes in technology, which have made our world different from that experienced by past societies. Moreover, this process had already occurred in the past, with societies of the past being very different to each other. However, even though these changes have been significant, it is important to remember that people are still people. All humans of the past were as human as us, and therefore, their instincts, desires and motivations did not differ much from our own.

i think it is a system for harvesting crops more easily

mass production/ assembly line production