3 examples of producers and 3 examples of consumers

Explanation:

whales, elephants, cows, they are consumers

tree,grass,algae are producers

Positive feedback mechanism:

This mechanism has positive correlation between the products and the process. The positive feedback mechanism result in the growth of a product. This mechanism is less common in organism and perform under specific conditions. Example: Process of blood clotting involves positive feedback mechanism.

Negative feed back mechanism:

This mechanism has negative correlation  between the products and the process. Negative feedback mechanism result in the inhibition of the product. This mechanism is more common in organism and maintains homeostasis in the body.Example: Regulation of blood pressure involves negative feedback mechanism.