Ecosystem have to have two factors working together in order to function. what are those two factors? a. trees and biotic factors b. temperature and abiotic factors c. biotic factors and living factors d. biotic factors and abiotic factors

Biotic factors and abiotic factors.

Explanation:

Ecosystem may be defined as the community of all the living organism and their interaction with the non-living organisms. They together works as the system.

Ecosystem includes both the biotic and abiotic factors of the system. The abiotic factors of the ecosystem are light, temperature and water. The biotic component of ecosystem are plants, animals and bacteria.

Thus, the correct answer is option (d).

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.