1. Palatability: Palatability can be defined as plant characteristics or plant conditions that stimulate the animal to graze the plant.
2. Palatable: This term has been defined as pleasing to the taste and therefore pleasing to the mind.
3. Preference: Preference is reserved for selection by the animal and is essentially behaviourism.
4. Relative preference: This indicates the selection of a plant species in proportion to another species.
