Select the most appropriate option to fill in the blanks.
As cattle are to herd so are birds to_____________.

Correct option is A

The correct word to fill in the blank is "flock." This analogy is based on the grouping names for animals. Just as a group of cattle is called a "herd," a group of birds is called a "flock."
• Therefore, the sentence correctly reads: "As cattle are to herd, so are birds to flock."
• The other options are not the correct collective terms for birds:
• "Litter" is typically used for a group of young animals born to an animal at one time.
• "Pack" is used for a group of dogs or wolves.
• "Streak" is not a standard term for a group of animals.
• Therefore, the correct option is (a) "flock."