What is the definition of a 'host'?

An animal or plant on or in which a parasite or commensal organism lives.

Explanation:

A host is in biology is defined as an animal or plant on or in which a parasite or commensal organism lives.

answer; coat color for blending in with dry grass;

the ems is the abbreviation for the emergency medical services. it is a service provided by a group of medical professionals specialised doctors and other healthcare staff.

any one can call 911 in case of any medical emergency and a group of health care professional will come and give the treatment required. every day the ems staff receive many phone call, which are related to different types of medical emergencies, out of which 25-28% are exclusively related to the respiratory issues.

so, the correct answer is 25-28%.