After holding our breath briefly, what eventually forces us to take a breath? decreasing oxygen levels. increasing oxygen levels. decreasing carbon dioxide levels. increasing carbon dioxide levels. increasing blood ph.

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

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