Answer:
Adequate stimulus for the sensory receptor cell.
Explanation:
Modality of a stimulus refer to the part of a stimulus that is discerned or perceived after a stimulus.
It is also called sensory modality. Examples of modality of stimulus include, light, touch, taste, temperature, smell and pressure.
E.g A smell modality is perceived after odor stimulate a receptor cell.
Adequate stimulus for the sensory receptor cell determine modality of stimulus within the nervous system.
