The diagram shows a food chain. Which term best describes the green plant in the food chain?
A. Competitor
B. Producer
C. Consumer
D. Predator

B. Producer

Explanation:

"Producers are organisms capable of creating simple carbohydrates such as glucose, from gaseous carbon dioxide. This process of producing organic molecules from inorganic carbon sources is called primary production."

- Bioglydictorany.net

I hope this helps :D

the answer is c.) there is a warm front in region a and a stationary front in region b.