What part of speech does bias play in this sentence The pattern cautioned that users be sure to choose a fabric with marked bias?

In the sentence "The pattern cautioned that users be sure to choose a fabric with marked bias," the word "bias" acts as a noun.

Here's why:

* Bias refers to the diagonal direction of the weave in a fabric, which is a specific and tangible thing.

* It's being modified by the adjective "marked," indicating that the bias is clearly visible.

* The sentence is saying that the pattern (a noun) advised (verb) the users (noun) to choose a fabric (noun) with a specific characteristic (the "marked bias").

Therefore, "bias" is functioning as the object of the preposition "with", making it a noun in this context.