Which is a characteristic of nuclear fusion but NOT nuclear fission?

a. releases large amounts of energy

b. is the energy source of stars

c. is used in electric power plants

d. requires little energy to occur

The answer is B. is the energy source of stars.

Fission is the type of nuclear energy simulated on Earth, as it is the one used to generate electricity. Fusion, on the other hand, is much more complicated to achieve because it requires extremely hot temperatures compared to fission. Fusion involves the combination of two hydrogen atoms to make helium, which releases a lot of energy. Stars such as the sun, exhibit fusion with its very hot temperature and abundant source of hydrogen.