I think for Question 14 it is the first option
for 15 i think it is option 3
it would have to be C. six from my under standing hope it helps
Answer:
The part of the digestive tract that contains villi is the small intestine.
Explanation:
The chain of infection is a process in which:transmission occurs when agent leaves its hosts through a portal of exit, is convey by mode of transmission ,and enters by portal of entry to infect a susceptible host .
