Describe how the catalyst, zymase speeds up the reaction shown

Describe how the catalyst, zymase speeds up the reaction shown

The catalyst zymase speeds up the reaction by catalyzing the fermentation of sugar into ethanol and carbon dioxide. It is mostly present in yeasts. 

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.