In an exothermic reaction, energy may be released to the surroundings in the form of?
A. Heat
B. light
C. Thermal
D. All of the above

All of the above

Explanation:

Exothermic reactions release energy usually in the form of heat, but also in a form of light (e.g. a spark, flame, or flash), electricity (e.g. a battery), or sound (e.g. explosion heard when burning hydrogen)

:D

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).