High-risk foods/Cross contamination

Which of these are conisdered as high-risk foods? Choose 3

How do you call the bacteria coming from eggs and poultry?

Haissam had flu but he still went to work due to a party in their restaurant. He kept on coughing on the chicken stew that he was preparing. How do you call this cross-contamination?

Shahd used an unwashed cutting board to chop the meat. The people who ate the food she prepared got sick. How do you call this cross-contamination?

The chef accidentally mixed some shrimps on the salad. The customer happened to be allergic on this food. How do you call this type of cross-contamination?