A concept map is shown. Which of the following topics best completes the graphic organizer?

A. Physical properties of elements

B. Chemical properties of elements

C. Evidence of a physical change

D. Evidence of a chemical change

C Evidence of Physical change

Explanation:

Because Solid forms is a physical change and so are all the other ones    

you didnt put any of the following

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.