Question

life processes essential for production of energy

Answer 1

There are seven life processes which state the condition of life. These include Nutrition, Respiration, Excretion, Growth, Movement, Reproduction, Response to stimuli. Nutrition: It is the process by organism procures its food. ... Oxygen is necessary to break up food and produce energy from it.

Answer 2

for several important processes that are vital to life. One of the most important is the growth and repair of cells and tissues - energy is required for the various biochemical reactions that achieve this. all the movements we do is due to energy . with energy we are nothing. todo any work we required energy . 
energy is requried for various activities  -
 

1, Movement 
2, Reproduction 
3, Sensitivity 
4, Nutrition 
5, Excretion 
6, Respiration 
7,growth