1. In economics, demand is the quantity of a good that consumers are willing and able to purchase at various prices during a given period of time.

2. milkfish, roundscad, sardines, frigate tuna, anchovies, mackerel, tilapia.

3. Pork is the most widely eaten meat in the world accounting for over 36% of the world meat intake. It is followed by poultry and beef with about 35% and 22% respectively.

4. the consumer is one who, or that which, consumes while retail is the sale of goods directly to the consumer;