Final answer:
The correct answer is hazardous waste.
Step-by-step explanation:
The correct answer is d. hazardous waste.
The other options - abandoned tires, raw sewage, and animal carcasses - are all examples of transboundary health hazards along the U.S.-Mexico border. These hazards can pose risks to human health and the environment. For example, abandoned tires can collect water and become breeding grounds for mosquitoes that carry diseases like Zika and dengue fever. Raw sewage and animal carcasses can contaminate water sources and spread pathogens, leading to waterborne diseases.
On the other hand, hazardous waste refers to chemicals and substances that are harmful to human health and the environment. While hazardous waste can be a significant health hazard, it is not specific to the U.S.-Mexico border and can be found in various locations worldwide.