10. ¿qué es?\nun escritorio\nuna puerta\nuna silla\nun mapa

Brief Explanations:

The image shows a chair. Let's analyze the options: "un escritorio" means a desk, "una puerta" means a door, "una silla" means a chair, and "un mapa" means a map. So the correct term for the chair in the image is "una silla".

Answer:

C. una silla (Note: Assuming the options are labeled as A. un escritorio, B. una puerta, C. una silla, D. un mapa. If the original labeling is different, adjust the identifier accordingly, but the text "una silla" is the correct choice.)