The correct answer is A) microorganisms are transmitted from one organism to another.
The chain of infection is a process in which microorganisms are transmitted from one organism to another.
The chain of infection starts with the agent of infection that is the one which makes people sick. It exists in a reservoir, where the agent of infection lives. There is a portal of exit. It is the way the agent leaves the reservoir. Then we have the mode of transition. It could indirect or direct contact with the agent. The agent o infection enters a new body through what is known as a portal on entry. Finally, the host. It is the individual who receives this agent and gets sick.
For maximum assurance preventing influenza or flu, the patient should be vaccinated with inactivated influenza vaccine (IIV) once a year. The vaccine is needed especially for those who are of greater risk to have a flu, including pregnant women, children, and persons with serious medical conditions.
Hormones from the stomach are sent to the brain to tell you when to stop eating
I'm not sure if this is a true or false question but if so then the answer is true. The skills and behavior you need to succeed at work will be different, there will be some similarities like organization, time management and effective communication but you also need skills like team work, knowledge of your profession, presentation skills, report writing, data compiling for example. You will also need to know how to talk to people in a professional manner, how to present yourself as hard working and how to dress appropriately.