What is Respiration?? Plz Help Me In Detail For Class 9

Your question has been heard loud and clear.

Respiration is a cellular process. Meaning , it only occurs in the cells of the living organism. Basically it is a biochemical process in which cells use oxygen and glucose supplied from nutrients , and combine the oxygen and glucose , and after combining them , it releases energy in the form of carbon dioxide , water and ATP molecule.  

Also , respiration can also be done without oxygen called anaerobic respiration.

Respiration done with oxygen is called aerobic respiration

Thank you

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.