Two atoms have two different proton counts. This means that the atoms a. belong to two entirely different elements.
Selected:b. represent different isotopes of one element. This answer is incorrect.
c. are likely to react violently with each other.
d. might be different ions of the same elements.

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.