Which of the following processes take place in all living organisms?
Respiration takes place in all living organisms through which they take in oxygen and give out carbon dioxide.
Transpiration takes place in leaves of plants through which excess water is evaporated via pores present in the leaves.
Photosynthesis takes place in green plants. This is the process with which they make food with the help of water and carbon dioxide in the presence of sunlight.
Thus, only option A is correct.