How is a covalent bond formed [what do the electrons do]?

the answer to your question is c.

if you read the house of usher you should know that the house was haunted

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.

0.88m hope i am correct : )

the pseudoscience are like beliefs, theories, or like practices that are considered scientific