I believe the 3rd one! If not I am very sorry.....
Answer:
A new birth of freedom
Explanation:
If we are thinking about <em>slavery,</em> a <em>new birth</em> of <em>freedom</em> would signify the end of slavery.
The others would not make sense, as they are referring to time and various aspects of the physical fighting of the war.
Answer:
Economics is a social science concerned with the production, distribution, and consumption of goods and services. It studies how individuals, businesses, governments, and nations make choices about how to allocate resources.