Final answer:
The EPA is the Federal agency responsible for assisting States in preparing for hazardous materials emergencies, offering training, resource information, and technical assistance.
Step-by-step explanation:
The Federal agency that provides training, resource information, and technical assistance to States to help them prepare for hazardous materials emergencies is the Environmental Protection Agency (EPA). The EPA has the responsibility of maintaining and enforcing national standards under various environmental laws, in consultation with state, tribal, and local governments. It not only conducts environmental assessment, research, and education but also works closely with industries and all levels of government in voluntary pollution prevention programs and energy conservation efforts, including measures on hazardous waste recycling, treatment, storage, and disposal.