What is the role of geological uplifting in
the phosphorous cycle?

a. it releases phosphorous stores in rocks and minerals so it can be used by living things

b. it converts atmospheric carbon into phosphate that fish require

c. it converts phosphorus into a form that living things can more easily use

d. it pulls excess phosphorous out of the cycle, preventing algal blooms

It releases phosphorous stores in rocks and minerals so it can be used by living things

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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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.