Give the meaning of migration. how is gross migration rate calculated

Migration is the seasonal movement of animals from one region to another.

Step 1: subtract immigration rate from emigration rate.

Step 2: divide result by 1000.

Step 3: multiply result by 100.

Natural increase (more births than deaths)

Step 4: divide the number of people emigrating from a country by a country's total population.

Step 2: multiply the result by 1000.

answer

ben’s food poisoning was caused by cross-contamination

explanation

cross-contamination in food occurs when harmful bacteria is transferred to food from other foods, utensils or cutting boards. it happens often when handling raw meat , sea foods and poultry. in this case, because ben did not wash hands before and after handing the poultry, chances that bacteria transfer   from the poultry to the vegetable are high.