The correct option is C Transpiration
∙ Transpiration is the process by which plants lose water in the form of water vapour through pores called stomata on their leaves.
∙ Cellular respiration occurs in all living organisms to obtain energy.
∙ Excretion is the process by which waste products are removed out from the organisms.
∙ Digestion of food is a process that takes place in higher organisms like insects, birds and mammals.