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Answer:
a. exothermic reaction
b. endothermic reaction
c. exothermic reaction
d. endothermic reaction
a. Exothermic
b. Endothermic
c. Exothermic
d. Endothermic
First know the definations....
Also look at the examples in the attachment!
Next are some symbols used in chemical reactions... it's in the attachment, these symbols make it easier for us to represent the chemical reaction (it makes understanding at a depth possible )..
Hope this helps ❤️