Which actions are involved in the immune response

regulating hormonal and autonomous responses
identifying and destroying harmful substances
increasing and supporting the ability of red blood cells to carry oxygen
regulating and adjusting the skin's secretion of sweat and oil

The correct answer is:

identifying and destroying harmful substances

Explanation:

The Immune rejoinder is the body's response created by its immune system being stimulated by antigens. This immune response can introduce resistance to pathogenic microorganisms and its products, The immune system protects the body from probably harmful substances by recognizing and responding to antigens.

hypoxemia refers to a below usual concentration of oxygen in the blood, mainly in the arteries. hypoxemia is an indication of an issue associated with circulation or breathing and may lead to various symptoms like shortness of breath.  

the condition is identified by determining the level of oxygen in the blood sample obtained from an artery. it can also be predicted by determining the oxygen saturation of the blood with the application of a pulse oximeter.  

the normal arterial oxygen is about 75 to 100 mm hg. the values underneath 60 mm hg is generally considered with the requirement for supplemental oxygen. the normal pulse oximeter readings generally range between 95 to 100 percent. the values under 90 percent are regarded as low.  

in the given case, the oxygen saturation is measured at 93 percent, hence, there is no need to administer oxygen, that is, one should withhold oxygen.