During an exothermic reaction; light and heat are released into the environment.
An exothermic reaction is one in which heat is released to the environment. This heat can be physically observed sometimes like in an a combustion reaction.
In an exothermic reaction, the enthalpy of the reactants is greater than the enthalpy of the products.
This heat lost is sometimes felt as the hotness of the vessel in which the reaction has taken place.
In conclusion, light and heat are released into the environment in an exothermic reaction.
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Look at the first person’s answer. Cause I know I’m wrong
        
             
        
        
        
I believe the answer is Anther. 
The Anther produces the pollen
        
             
        
        
        
Answer:
g=GM/R^2
Universal Gravutation Constant: 
f=GM×m/R^2
Force can be also expressed as
f=m×g
so,
mg=GMxm/R^2
The m gets cancelled so
 g=GM/R^2