solved I’m working on a writing question and need an explanation

I’m working on a writing question and need an explanation and answer to help me learn.

At the top of the page, write your research paper title and then research question in its current form . 
List, alphabetically, by the author’s name (title if there is no author), all ten sources that you intend to use in your final research paper. For each source, present the following information:
Complete bibliographic information (the title, author, publisher, date etc.), formatted according to the MLA Style.
The source summary.
Each summary must include the following information:   
A brief summary of its main points (minimum four to five sentences).

The answer to your research question (minimum three to four sentences).

A brief critique (minimum three to four sentences), based on your evaluation of the evidence and/or the reasoning, describing how persuasive the source (article) is.
My research question is: How the earth’s climate has changed in the past few decades? 

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