How might changed in the cycling of matter and flow of energy in the Earth system affect the intensity and duration of a drought?

put the answers   and i could answer.

1 is the answer to this problem

answer///carbon;

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.