What is a common goal of researchers who develop antibiotics and antiviral drugs?
a) to kill bacteria b) to prevent infections c) to stop pathogens without harming host cell d) to kill viruses

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

nb

explanation:

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