What are the key concepts in the food service industry, including types of service and safety management?

Here are the answers to all the questions from the image:

1. The question is likely asking about the industry that prepares meals. The most fitting option is "food service". Answer for 1: $\boxed{\text{food service}}$

2. Types of food service include buffet service, Chinese banquet, and home service. Water service is not a type of food service itself, but rather a component of service. The correct option is (a). Answer for 2: $\boxed{\text{water service}}$

3. Food safety management systems are essential for the quality of the food consumed, ensuring it is safe and wholesome. The correct option is (a). Answer for 3: $\boxed