What must be done to breed dogs for a particular trait? mate any dogs and see what variations occur. place dogs in places where they can acquire the trait. mate two dogs that have the desired trait. protect dogs with the trait from natural selection.

Mate two dogs that have the desired trait

Explanation:

In order to breed dogs for a particular trait one ought to mate two dogs that have the desired trait. This process is referred to as artificial selection or selective breeding.

Selective breeding refers to a process by which new organisms with desirable characteristics or traits are developed. Breeders select two parents having the desired phenotypic trait to reproduce thus yielding offspring with the desired trait.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

allowed for the prediction of the properties of missing elements.