Recently, a lot of resources which can replace animals have been made by human. Some people oppose to employ living creatures for eating, clothing and medical advancement. However, I disagree with the view for the following reasons.
The most individuals still require living creatures to maintain health condition with balanced diet. This is because the diet include protein which can obtain from them. For instance, there are not only various vegetarians but also those who eat only meats and love meats. Although animal protein can substitute for other type of food, this is limited to type of food such as egg, bean and milk. Prohibiting the use of animals for food may deprive chances which enable to eat food freely and people can suffer from the loss of nutrients.
A wide range of medicine has been developing for lengthening human lives. This academic field considers importance of saving human life than animals. Precisely, if animal research is not processed in regarding of drugs, individuals who take a drug will experience side effects directly. The risks and mortality about medicines will increase and the government can not guarantee the public's safety in the state. The medicine without animal research should have harm effects on human. It is not suitable for medical objectives and can not develop the field.
In conclusion, I can assume that the use of living creatures is needed for food and medicine due to fact that people have right to eat food freely for their healthy and medicine includes potential risks for human lives.