Hey there!
Understanding what the question is asking:
We understand that the question is asking about that we would have to right or propose a new amendment for the Constitution that would describe or establish a critical 'right' that would not be currently protected by the document, which is the 'bill of rights'. And then, after analyzing this, we would have to consider why this is not being protected. Let's get started!
Answer:
The first amendment that was not protect, was the following: “Congress shall make no law . . . abridging the freedom of speech.” [tex]\leftarrow[/tex] answer.
How?
The reason why this is not protected is because the congress believed that protecting a law the is just a freedom of speech would not need to be protected. Which, in the case, I agree with this also.
But, just because the government can not a make a law about this, they can still handle consequence within court about this.