Question

breeding a dog that has a good sense of smell with another dog that will retrieve game birds to produce offspring with both desirable traits is an example of
select choice v.

Explanation:

The problem is about breeding dogs to combine desirable traits (good sense of smell and retrieving game birds), which relates to the subfield of Biology (under Natural Science) as it involves selective breeding, a biological concept related to genetics and animal breeding.

Answer:

Biology (under Natural Science)