Scientists around the world have been working for decades on perfecting the process of nuclear fusion in the lab. which statement justifies this research?

scientists are looking for a way to generate an unlimited source of hydrogen.
scientists are looking for a way to absorb the energy produced by nuclear bombs.
scientists are looking for a way to produce the uncommon noble gas helium.
scientists are looking for a way to create cheap, safe, and sustainable energy.

if someone had the list of traits you provided

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.