Final answer:
In an endothermic chemical reaction, heat is absorbed from the surroundings. Examples include processes like the melting of ice. Other chemical reactions types, such as reversible or irreversible, do not specifically imply heat absorption.
option A is correct.
Step-by-step explanation:
The correct answer is a. endothermic. Endothermic refers to a type of chemical reaction in which heat is absorbed from the surroundings. This occurs because the reaction requires energy to break the bonds of the reactants and form the products. An example of an endothermic process could be the melting of ice, which absorbs heat from the environment to change from solid to liquid state. Note that irreversible, reversible, decomposition, and disintegration are also types of chemical reactions but do not necessarily require heat absorption.
Learn more about Endothermic Chemical Reactions