The number of different species in an area is called the area’s biodiversity

One reason to preserve biodiversity is that wild organisms and ecosystems are a source of beauty and recreation. In addition, biodiversity has both economic value and ecological value within an ecosystem. Many plants, animals and other organisms are economically valuable to humans. Also, all the species in an ecosystem are connected to one another.

A keystone species is a species that influences the survival of many other species in an ecosystem.

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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.  

the answer is d. none of the above