Question

can anyone tell me defination of respiration , photosynthesis , combustion​

Answer 1

respiration: The process of intake of o2 ,breakdown of glucose ,production of energy and exhaling co2

Photosynthesis: The process of formation of food by green plants or autotrophs

Combustion: Vigorous process of burning in the presence of air

Answer 2

Respiration:it is an chemical process in which living organisms take in oxygen and use it to break down food and convert it to glucose.

Photosynthesis: it is an chemical process in which plants take in Carbon dioxide, water and sunlight and convert it into glucose and give out water vapour and oxygen.

Combustion:it is an chemical process in which oxygen reacts with certain things and produce fire i. e. Heat, light energy.
Hope its helpful