Respuesta :
A cladode is defined as a flattened stem or internode that is likened to a leaf including its functions as a leaf. It is an adaptation to reduce water loss, since it contains fewer stomata. Hence the answer to this problem should be A. water retention.
"Photosynthesis" is the one among the following choices given in the question that describes the main function of the cladodes. The correct option among all the options that are given in the question is the third option or the last option. I hope that this is the answer that has actually come to your desired help.