Fill blank (ii).

Directions: Read the following passage having some numbered blanks.

Pigeon is a working bird. Carrier pigeons are trained to carry messages to people. The note is placed into a small skinny can, and then it is tied to the pigeon’s leg. Pigeons are good messengers because they are fast and can fly long distances. They also can reach places that people can’t. From high up in the __(i)__, specially trained pigeons can __(ii)__ orange coloured life jackets in the ocean, as __(iii)__ it is difficult for humans to spot people at __(iv)__, especially in bad __(v)__.