All the provided answers are correct, some of the benefits of first aid are:
Improves the chances of survival: Those trained have the ability to
assist an injured or ill person during a variety of emergency
situations.
Reduces the risk of permanent injury: First aid
treatments such as the Rest, Ice, Compression, Elevation are very
helpful for strains, sprains,
contusions, dislocations, or uncomplicated fractures, avoiding in a great percentage permanent injuries.
Reduces the risk of infection: Standard precautions taken by people
trained in first-aid are the principle means of ensuring infection
control in while performing
