Which is the best example of a primary source? a letter written by a person who is describing a current event
a scholarly article about an event from a long time ago
an interview with a reporter who wrote about a current event
a student's report about an event that occurred during her lifetime

a letter written by a person who is describing a current event

Explanation:

A primary source is a document from the time period of the event.

While most of these could be considered one, you have to do a process of elimination.

A scholarly article about an old event isn't a primary source, so it's not that.

An interview with a reporter who wrote about a current event is not a primary source because it is not the original document from the reporter.

A student's report about an event that occurred during her lifetime is a primary source, but it is not the best example.

I'm like 92% certain it's the first one.

health and medicine because people are dying from not being healthy or not strong enough medicine

equal area projections

equal-area projection. a projection in which regions on the earth's surface that are of equal area are represented as equal.