Question

All plants givve out oxygen during day and carbon dioxide during night give rason

Answer 1

Because we all know that plants give out oxygen during the process of photosynthesis...but at night due to the absence of sun the is no no photosynthesis hence no oxygen and at night the plants breadth in oxygen and release carbon-dioxide

Answer 2

Hey!!
plants makes their food in the day time (presence of sunlight) and gives out oxygen during the process of photosynthesis...
bt in the night time plants are not able to synthesis their food (lack of sunlight ) so they cannt gives out oxygen and librates carbon dioxide...
I hope it will be helpful for you..........