What occurs when vibrations traveling through an object match the object’s natural frequency? a. reflection b. refraction c. diffraction d. resonance p

D) resonance

Explanation:

When an object resonates with a sound wave, it amplifies due to the wavelength of the sound wave is the same as the object's natural frequency (dependent on the material and the length).

answer: 20 percent

the fish culture has become a developing commercial practice in developing countries which is already prominent in developed countries of the world. the major fish protein demand is being supplemented in developing countries is   fishing to meet the needs of the growing population. therefore, in some developing nations, the percentage of animal protein from fish in the diet can be as high as 20 percent.