The answer is D. Authentication.
Answer:
Sounds.
Explanation:
Sound may be defined as the form of energy that enable us to hear the different objects and voice. The sounds can be used to study the human psychology as well.
The professor introduces the student in the linguistic department. This department is famous for the organization of the different sounds and signs used in the different language. Mildred can surmise that the professor in the linguistic department studies different types of sounds.
Thus, the answer is sounds.
Answer:
This may be wrong but try D. I'm sorry if that is wrong.
Explanation:
Answer:
I think its b because pathogens means contagious by touch or medicine.
Explanation:
I think it may be B. Struggling with puzzles others his age might have mastered