All living things need energy from the sun for their cells to grow and function. once food is eaten, it goes through a series of chemical reactions called energy from the reaction is used to and grow new ones. bone and muscle growth comes from reactions. provides nutrition to plants. it also provides energy to animals that eat the plants.

just finished the test, the answer is d, greg is the least cost-effective because he charges the most for the project

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