Concept:Piglets are introduced to solid feed gradually, starting with the most digestible ration and moving to heavier diets as they mature.
Explanation:At day old, piglets still depend on the sow but are offered creep feed as a supplement.
Creep feed is given first because it is easily digestible and suited to young piglets.
After weaning, the piglets are placed on a weaners ration to support the transition.
Next, a growers ration is provided to promote steady growth and muscle development.
Finally, a finisher ration is given before the pigs reach market weight.
Therefore, the sequence from day old is creep, then weaners, then growers, then finisher.
Answer:B. creep > weaners > growers > finisher.