What is the defining characteristic of a water cycle? a. the water passes through at least five different locations. b. it does not include any human water usage. c. it passes through plants, animals and the ocean. d. it has the same starting and ending point.    tell me

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.