Correct choice is (a) sense taste
To explain: In the food industry, biosensors are used to sense taste, freshness odor and to find out toxic substances. Biosensors are used in different fields as follows:
• Defense: To detect mustard gas, nerve gas, etc.
• Industry: To detect alcohol, acids, phenols, etc.
• Sports: To determine fatigue by measuring levels of lactic acid, ammonia in perspiration.