Why is The Giver the one with all of the memories?

So that not everyone will be burdened and pained.

So that everything will stay the same and the community won't rebel.

So there is no jealousy.

Because he is the most intelligent person in the community.

I think the first one is the correct answer.

Explanation:

I don't know a good explanation for this but but it is because if everyone could have those memories then the Giver's society would not be a "utopia" like they wanted it to be. If everyone had some of those memories everyone would be burdened and feel too much pain.