You should include majority of your evidence in the introduction paragraph. Am I correct?

No, You should use evidence in all of your paragragps EXCEPT for in your intro and conclusion. If you use all the evidence in the first one then the reader will not want to read it anymore.

Explanation:

Hope this helps!

No that is not correct.

Introduce the topic in the intro, but keep the main evidence for the body paragraphs

Explanation:

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the sample answer on e2020

conflicting values are demonstrated between two different groups in animal farm. first, the farm animals value hard work. this is shown by them working late and working long hours at the request of the pigs. napoleon and the pigs, however, sleep late daily. furthermore, the animals value equality. this differs from the value of napoleon and the other pigs. instead of equality, they value only gaining power and maintaining their own privilege, which is demonstrated by their taking extra milk and sleeping in beds.