Final answer:
Breeding horses with desirable traits does not automatically guarantee that the offspring will have those traits. The inheritance of traits depends on various factors, including genes and the environment.
Step-by-step explanation:
The answer to the question is C. It depends on other factors. When two horses with desirable traits are bred together, there is no guarantee that the offspring will inherit only those traits. The inheritance of traits is influenced by multiple factors, including the interaction of genes from both parents and the influence of the environment.
In the case of breeding a horse with long legs and a horse with a large lung capacity, the offspring may inherit one or both of these traits, but there is no guarantee that they will automatically have both traits. Other factors, such as the presence of other genes and environmental influences, can also play a role in determining the traits of the offspring.
For example, if the horse with long legs carries genes for a smaller lung capacity and the horse with a large lung capacity carries genes for shorter legs, the offspring may inherit a combination of these traits or variations of each trait.