Question

an owl has to move its whole head to see because its eyes
a have no eyelashes.
b are each a different color.
c do not move from left to right.
d are not protected by eye lids.

Explanation:

Owls' eyes are fixed in their sockets and cannot move from left to right. So, to change their field of vision, they have to move their whole head. Eyelashes (A) and eye - lid protection (D) are not related to the movement of the head for vision. And having eyes of different colors (B) is also not a reason for head - movement for vision.

Answer:

C. do not move from left to right.