Answer:
When the body is cold, the blood inside the body travels via different route to rise the temperature of the body so that it fells hot and stable.
During the time of exercise, the blood distribution changes and hypothalamus signals for reduced vasometer stimulates the vessels present in skin.
Blood moves through the capillary beds and radiates heat from the body to make it feel cool.
This is a short term neural control mechanism of the body to meet the specific demands.
Most infectious disease will be caused by one of four types of germs:
Bacteria – single-celled organisms that reproduce themselves, by themselves.
Virus – microorganisms that cannot reproduce themselves; they take over the cells they infect in order to reproduce and spread.
The correct answer is biological.
Biology deals with the inner workings of our body - so, if something is the result of hormones and other physiological processes, then it will definitely be related to biology. The other options have more to do with the environment, rather than with the body itself.
