Sarah has been eating and sleeping poorly. She was just diagnosed with pneumonia. Tests showed the illness was caused by Streptococcus pneumoniae. In the chain of transmission, Sarah is the , and Streptococcus pneumonia is the

The nature–nurture issue refers to the debate over the relative contributions that make to the development of psychological traits. a.introspection and nerve cell activity b.unconscious and conscious motives c.behavior and mental processes d.genes and experience