Ais a discussion characterized by procedures of argumentation.

Answer is: debate.

Debate involves formal discussion on a particular topic where opposing arguments are put forward to argue for opposing viewpoints.

Debate is a formal type of discussion, often with a moderator and an audience

It happens in public meetings or academic institutions.

Debate is also an argument about a particular subject, in which many people are involved.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.