Pls help me I don’t understand it’s for my science class. Plz check if correct and tell me wether each is element or compound

there are some materials listed so next to it it shows that which material is pure substance and which material is mixture

and then the next shows which is a homologous and homogeneous compound or element

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.