Answer:
The purpose of a primary source document is a way to promote a deeper understanding. A primary source is a source that is acquired first-hand such as an interview, diary or autobiography, so a source that consists of original material, such as an interview.
Explanation:
Primary sources help students relate in a personal way to events of the past and promote a deeper understanding of history as a series of human events. Because primary sources are incomplete snippets of history, each one represents a mystery that students can only explore further by finding new pieces of evidence.
<em>Heyo!</em>
<em>The answer is..</em>
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A.
Because, i did this before.
Hopefully, this helps you!

Answer:
The movement of tectonic plates create volcanoes along the plate boundaries, which erupt and form mountains.
Explanation:
Answer: you would see an afterimage of a flag with the opposing colour systems(blue,black and red in middle), then white surface of the paper
Explanation: The opponent-process theory states that the cone photoreceptors are linked together to form three opposing colour pairs: blue/yellow, red/green, and black/white and the activation of one member of the pair inhibits activity in the other.
So after staring at a white sheet of paper for a minute, the yellow, white and green parts of the three opponent-process systems would be fatigued and unable to oppose the blue, black and red parts of these systems when you stare at the white sheet of paper. Therefore after seeing white, you would see an afterimage of a flag with alternating blue and black stripes and a block of red in the middle. Once the opposing parts of the three systems recovered, the flag afterimage would disappear and you would then see the white surface of the paper.