In the 1800s and early 1900s, many American ranchers and farmers moved west. They helped to settle the United States' western territories. The ranchers and farmers wanted to protect their families and livestock, so they killed many predators, including wolves.

Today, there are too many animals such as deer, which were previously hunted by wolves. Scientists are trying to decrease the number of these overpopulated animals by setting up protected areas for wolves to live.

How might this action affect western ecosystems?
A. This action will likely have no effect on western ecosystems.
B. The wolves will bring the deer's population down to a reasonable level.
C. The wolves will cause the deer to become extinct.
D. The wolves will cause western ecosystems to become polluted.

b.have there own function.

its temperature is increasing. this causes molecular vibrations to increase.

wegner's theory did not explain how the continents could move

explanation:

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.