Concept:Traction effort is the pulling force of a draught animal; it is determined by working traits, not by traits of the animal used for food.
Explanation:Age is an important factor because mature animals generally have greater strength and stamina for work.
Sex influences traction effort, as males are usually stronger and larger than females.
Breed also matters, because certain breeds are better suited for pulling loads.
Meat quality, however, concerns the value of the animal after slaughter and has no connection with its pulling power.
Therefore, meat quality does not influence traction effort.
Answer:D. meat quality