Question

the bold word is a \middle swabi\ (subordinating conjunction). does the highlighted comma belong? captain marvel marinated the chicken, while i boiled water for pasta.

Explanation:

When a subordinating conjunction (like "while") is in the middle of a compound sentence (connecting two independent clauses), a comma is used before it to separate the two independent clauses. Here, "Captain Marvel marinated the chicken" and "I boiled water for pasta" are two independent clauses connected by "while" (middle SWABI), so the comma belongs.

Answer:

Yes, the highlighted comma belongs.