Read the passage and then answer the question. Other optical effects are rarer because they require more specific circumstances. One such phenomenon is variously called a parhelion, a mock sun, or a sundog. Sundogs are caused when flat, hexagonal ice crystals are present in the atmosphere. As the crystals move, light is refracted through the crystals to create a circular effect called a halo. If the crystals are being pushed in one direction by the wind, the light will be concentrated in spots on either side of the halo these bright spots are known as sundogs.

Choose the correct word or phrase that should replace the underlined word.

One such phenomenon is variously called a parhelion, a mock sun, or a sundog.

Question 11 options:

parhelion:

parhelion.

parhelion;

correct as is