History repeats itself a lot in our everyday lives, the reason for that is because it reminds us how things were back in olden days, and get repeated in the future, We learn new things every day because of history, without history, we would be nowhere
<span>The correct answer is the Annular Solar Eclipse. An annular solar eclipse happens when the Moon covers the Sun's inside, leaving the Sun's unmistakable external edges to shape a "ring of flame" or annulus around the Moon. The ring of flame denotes the most extreme phase of an annular sun oriented shroud. Sunlight based shrouds happen when the Moon throws a shadow on Earth.</span>
A summary is a breif explanation/sum up of what you have talked about or what ever the topic was. It is used to wrap up everything you have explained. It is better to use summary's so that we can say the main idea in less words and so people can read it quicker and get the idea of that topic.
Yes you just have to say where you got it from
You cannot put any sort of endmark (period, question mark, or exclamation point) here because it is not a complete sentence. Complete sentences must have a subject and a predicate. You can tell there's not even a verb here, so this is just a fragment, and we would have to use a comma.
a. Very truly yours,