The correct answer to this open question is the following.
Although the question is incomplete because it does not provide a specific reference about the author of the letter or any other reference, we can comment on the following.
A primary source is the piece of information that was written by a character or an individual that lived in the moment of the event, was part of the event, or witnessed the event. This individual could have written a letter, or a document -including a book. Or he/she took a photograph. Or was part of an interview. The secondary source includes information from a third person who was not part of the time or event but has found information through other resources. It is the case of an encyclopedia or researchers/historian books.
The ground surface temperature was 130 degrees Fahrenheit
To bring the north and south together and get along peacefully
Department of Agriculture providesleadership on food, agriculture, natural resources, rural development, nutrition, and related issues based on sound public policy, the best available science, and efficient management.
Department of Commerce is dedicated to promoting economic growth.
Department of Defense. provides the military forces needed to deter war.
Department of Education establishes policy for, administers
Department of Energy ensures America's security and prosperity by addressing its energy, environmental and nuclear challenges.
Department of Health and Human Services is responsible for providing public assistance programs to the population they serve. Various aspects or alternate names include social security, social affairs, human resources and welfare.
Department of Homeland Security.Keeps people out of the USA and protects our countries border.
Department of Housing and Urban responsible for national policy and programs that address America's housing needs.
bold is the explanations!!!