I’m pretty sure the answer is the first option, but I could be wrong
The Warring State Period was an era of chaos in ancient history of China. This era is full of warfare. There were bureaucratic and military reforms too. This era is dated as 475 BC to 221 BC. It is also known as era of division. There was a period of peaceful and philosophical Spring and Autumn. then almost all the states were indulged in wars. Then Qin laid the foundation of Qin Dynasty by conquering all the states. Under the Qin Dynasty, China reunited again.
Answer:
1. Ecologists call this one-way flow of matter and energy from a producer to a primary, then to secondary, and perhaps to a tertiary consumer, a food chain. ... ~ Single food chains do not show all the feeding relationships in ecosystems. The food web shows all the organisms at each feeding level or trophic level.
2. Energy flows through an ecosystem in one direction: from producer to primary consumer to secondary consumer to higher consumers. A biomass pyramid provides a picture of the feeding and nergy relationships within a food web and the direction of the flow of energy.
Explanation:
