Answer
D.Diffraction
Explanation
Diffraction is a property that is experienced by waves when they come across a barrier when they are in motion.
The ways tends to curve behind the barrier. This is called diffraction of waves.
Now, sound is a wave and it also experience diffraction. . So the brother will be able to hear the sound due to diffraction
The answer is D. time really does pass more slowly in a rest frame of reference relative to a frame of reference that is moving
The Cell Membrane is what controls what enters and leaves the cell.
I think it is the core and outer core.
hope this helped.
