For a multistep reaction, the overall rate law . Multiple select question. excludes any species involved in the rate-determining step is the same as the rate law for the slowest step includes the concentrations of intermediates formed in the slowest step includes the concentrations of reactants only

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.