In experimental physics, reverberation produces echo and thus makes undesirable sound. An echo is a sound reflected off of a surface. In a big hall, it interferes with the actual sound. It gives confusion when people are having a conversation.
I believe the answer is D
Wiesel is in his home in Poland in the excerpt.
Mesoderm <span>is the layer of tissue that forms during gastrulation and becomes the animal's organs.</span>
I believe it's B. It seems to be the only one that is very blunt and uses a different tone from the other sentences.
