Question

what should one do immediately after contact with pets, pet food, and barnyard animals?
cook food thoroughly
use a probe thermometer
wash hands

Explanation:

Contact with pets, pet food, and barnyard animals can lead to the transfer of bacteria and other pathogens. Washing hands is a basic hygiene practice to remove these contaminants. Cooking food thoroughly and using a probe thermometer are related to food safety during cooking, not directly to post - contact with animals.

Answer:

Wash hands