Question

Difference between producers and consumers on the basis of mode of nutrition

Answer 1

consumers consume materials generated by the producer hence they use the too, nutrients and oxygen.
producers are capable of photosynthesis a process by which they convert lighflt energy into chemical energy while consumers use respiration

Answer 2

Producer: The mode of nutrition in which organisms prepare their own food by simple inorganic material like carbon dioxide and water in the presence of sunlight and chlorophyll. This type of nutrition is seen in :1. Green plants 2. Euglena 3. Autotrophic bacteria This mode of nutrition is also called Autotrophic nutrition. 
Consumers: The mode of nutrition in which organisms do not prepare their own food but obtain from other organisms. This nutrition is seen in:1. Humans2. Non green plants3. Animals This mode of nutrition is also called heterotrophic nutrition. 
Hope this helps you.