Please write for Post 1 and Post 2 one or two paragraphs on the posted material. So 1 or 2 simple paragraphs per Post.
Just a comment on the writing or an critique. Or just your thoughts on the assignment. You can also include material from the web but add an reference. You don't have to comment on the whole post. you can just pick parts out of it.
You can always write that you agree or disagree with it but you have to explain why.