Your brother is insisting that you'll never hear a sound produced behind a barrier wall at the end of your yard. you notice that the door within the wall is open and quickly explain to him that the sound will be able to reach you due to
a. focusing.
b. diffraction.
c. reverberation.
d. diffusion.

Correct answer choice is :

B) Diffraction.

Explanation:

Diffraction applies to several aspects that happen when a wave meets a barrier or a split. It is described as the bending of waves about the corners of a barrier or opening into the area of the geometrical obscuration of the barrier. Diffraction is the bending of waves around obstacles and openings. The amount of diffraction raises with rising wavelength.

i guess that visual aids present persuasive examples to what you are presenting, some factors would be theme (does it fit with the color, information, what you are presenting), size (can you see it, is it a big enough span of data/information), and overall look of the visual aid.

hope this : )

answer: i'm not sure which is which for i get confused on it all the time but i can tell you that the answer lies with the convex and concave devices. i hope this you. have a good day and best of luck to you!

explanation: