Actually, it is INNATE IMMUNITY. That is the proven right answer so be careful.
The answer;
Through hands;
The primary mode of transmission of microorganisms to food contact surfaces is your hands.
Explanation;
Hands are contaminated through the touching of other parts of the body, using the restroom, Handling or caring for animals, coughing, sneezing, blowing nose, handling raw meat/poultry, Handling garbage/dirty dishes, Handling money, among other ways.
Contaminated hands in turn contaminate food and food contact surfaces.
Firstly, we need to know what a healthy ecosystem is. When an ecosystem is healthy, this would mean that it could supply all the resources that all organisms present in it and with all the resources, there is diversity. Old growth forests are considered healthy because of this reason. These forests remain untouched and had remained in providing the resources needed for the organisms present in it.
That is called Agronomy. It also studies soil and other outdoor vegetation!
Answer:
Chloroplast of Leaf Cells
Isnt that Right?