Which of the traits below are likely vestigial? the small thumb on a human hand tiny eyes on an insect living in a lightless cave small tentacles on a burrowing amphibian that are used for sensing food. the giant eyes of a fish living in a low-light environmen?

Vestigial organs or parts of the body are those that has lost its function in the course of evolution. These organs or parts have degenerated or atrophied. It can appear as remaining small or imperfectly developed. An example is the tiny eyes on an insect living in a lightless cave.

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.