Concept:A linear (straight-line) feeding relationship is called a food chain.
Explanation:A food chain shows how energy passes from one organism to another in a single, direct line.
For example: Grass
→ Grasshopper
→ Frog
→ Hawk.
Here, grass is the producer, and each arrow shows the direction of energy transfer.
This is different from a food web, which is many food chains joined together in a complex network.
A producer is just one organism, like a green plant, that makes its own food.
Ecology is the broad study of how organisms interact with each other and their environment.
Only a food chain is described as a linear sequence of feeding relationships.
Answer:B. food chain.
