Thursday, September 1, 2016

 This is a tree. It is a producer.
This is a snail. It is The first consumer.
This is a human or Peam. He is the second consumer.

The tree is eaten by snail. And Peam who is the second consumer eats a snail. So, the tree is a consumer, The snail and Peam are consumers. But The snail is the first consumer and Peam is The second consumer.