If the kinetic and potential energy in a system are equal, then the potential energy increases. what happens as a result?
total energy increases
stored energy decreases.
energy of motion decreases.
tkal energy decreases.

what are the choices?

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.