Final answer:
Scabies requires contact precautions as it is spread through direct skin-to-skin contact. Measles is spread through airborne transmission, while diphtheria and pharyngitis caused by Streptococcus pyogenes require droplet precautions.
Step-by-step explanation:
Among the choices provided, the disease that requires contact precautions is scabies. Scabies is a contagious skin infestation caused by a mite and is primarily spread through direct skin-to-skin contact. Measles, on the other hand, is highly contagious but is primarily spread through airborne transmission via respiratory droplets when an infected person coughs or sneezes. Therefore, measles would require airborne precautions rather than just contact precautions. Diphtheria and pharyngitis caused by Streptococcus pyogenes, require droplet precautions due to the potential for transmission through respiratory droplets from coughing or sneezing.