which of the following things can you not write with?\nla pluma\nla luz\nel bolígrafo\nel lápiz

Brief Explanations:

To solve this, we analyze each option: "la pluma" (the pen), "el bolígrafo" (the ballpoint pen), and "el lápiz" (the pencil) are writing instruments. "La luz" means "the light", which is not a tool for writing.

Answer:

B. la luz