The answer is bufanda a scarf.
hope this helps!
ANSWERS:
1) (El/Un) reloj está al lado del pizarrón.
2) (La/Una) silla está debajo del pupitre.
3) (La/Una) mochila está dentro de la sala de clase.
4) (La/Una) ventana está delante de la silla.
5) [I have no idea where the teacher’s desk is in the picture so if you could locate it for me I can form a sentence for this number for you :) ]
6) (La/Una) maestra está lejos del reloj.
Hope this helps ^^
Answer: The space should be filled with "grande".
Explanation: This statement can be translated to;
Carolina: The Prado Museum is one of the biggest in Spain.
Diego: Incredible! This means that it has many artworks and paintings.
