Aforest fire is an example of regulation.
density-dependent
density-independent
r-selected
k-selected

The correct answer is B. Density-independent

Explanation:

In biology, regulation occurs as there are factors that influence the number of individuals of a species as well as the fertility or death rate of it. In the case of density-independent regulation, this describes factors that are not linked to the population density of a species but instead can affect populations of all sizes this includes weather conditions and natural disasters including fires. This differs from density-dependent regulation that occurs depending on the population such as predation, certain diseases or predation. Considering this, it can be concluded a forest fire is an example of density-independent regulation because it regulates the size of the population by increasing death rate but does not depend directly on the population.

69 is the correct math for the amino acids

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.