Final answer:
A tetanus shot is related to orthopedic issues by preventing infection in open fractures, which helps avoid complications like tetanus; it does not promote bone healing or reduce pain.
Step-by-step explanation:
The relationship between a tetanus shot and orthopedic issues revolves around the prevention of infection. As tetanus is caused by the bacterium Clostridium tetani, which can infect open wounds, such as open fractures in orthopedic injuries, receiving a tetanus shot can serve as a preventative measure. It does not, however, promote bone healing or reduce pain in fractures. Therefore, the correct answer to how a tetanus shot is related to orthopedic issues is A) It prevents infection in open fractures.