The breathing rate is being monitored spontaneously and amended in the body of a human being so that the internal environment is being maintained within certain limits. An individual can only work effectively if their internal conditions are maintained within a particular range. This is known as homeostasis.
Homeostasis refers to any procedure, which is used by the living things to actively sustain the fairly steady conditions essential for living. The conditions within the body need to be monitored spontaneously as the cells rely upon the environment of the body to live and perform their activity.
both c and d are pretty accurate, but i dont have very much knowledge on warblers specifically. but those 2 answers would be the most common for such a case
