Oral rehydration therapy is preferred over intravenous therapy for fluid replacement caused by diarrhea because it

The answer for this would be:

That it is more readily available.

This therapy method uses some modest amount of salts and sugar in the water,for the patient to drink it, and it can also be given via nasogastric tube. Thus making this treatment simple and ready for any person with dehydration.

we would need to see the picture to answer it

when it is at an intermediate population density