To complete your pictorial representation of the problem, you should compile two lists: one of known quantities and one of the unknown variables that will allow you to answer the question in the problem. Below are all of the relevant quantities in this problem. Sort them accordingly.

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.