DeShawn is studying homeostasis and circulation. To organize his findings, he constructs two modules of the human heart, veins, and arteries: one to represent a non-smoker, and one that includes attributes typically found in the smoker. By comparing the two models. which relationship or cause and effect can DeShawn best explain?

a

explanation:

check for the pregnancy rating of drug. if its class c or d see if other alternatives

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this