Match the following vocabulary words with their definitions. 1 .
heliocentric theory
Force or pull in the universe that makes heavenly bodies tend to move toward each other
2 .
eyepiece
Primary light-gathering lens or mirror on an optical instrument
3 .
reflecting telescope
Telescope in which a lens gathers and focuses light and the resulting image is magnified by the eyepiece
4 .
objective lens
Having or representing the sun as the center
5 .
refracting telescope
Lens, or set of lenses, in a telescope or microscope that is nearest the eye of the user
6 .
ocular
Eyepiece of a telescope or microscope
7 .
gravitation
Telescope in which a mirror gathers and focuses light and the resulting image is magnified by the eyepiece

answer; ////increased water pollution; ///////////////////////

answer: the answer is b

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.