You are holding a rock tied to a string, which is an example of a pendulum. Identify
and explain the proper term for each part of the pendulum in this example.

it consists of a string, a weighted rock, and a fixed point which would be your hand since you are holding it.

Explanation:

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.