1
In the following article What Are Bitcoins? How Do Bitcoins Work?, it is mentioned that a blockchain is composed of three parts:
Although, after taking a look at this question "Can someone explain how the Bitcoin Blockchain works?" it doesn't reflect what that article mentions.
If those three parts are the actual parts of a blockchain, can someone provide a better explanation for each one?
2
They are not. They might be provided to try to provide a better explanation, but I don't even think that this purpose is achieved. There are several sentences throughout the article that make no sense at all, like:
A bitcoin, at its core, is a very simple data ledger file called a 'blockchain'. A blockchain's file size is quite small, similar to the size of a long text message on your smartphone.
I would recommend you to look at the question you mentioned , that actually have two really good answers, and ignore the first article.
Agreed, the terminology in that article is totally confused, and the information about mining is hilariously obsolete. Throw it away and read something else. – Nate Eldredge – 2017-09-24T02:30:24.517