The primary role of coenzyme A in aerobic respiration is to A. speed up the citric acid cycle.
B. transport electrons to FAD
C. kick off the transport electron cascade.
D. activate acetyl CoA and other molecules in the citric acid cycle.

i would say b

explanation:

but i think i would need more information than that

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.