Tree → Birds → ParasitePyramid of biomass of the above given food chain is :-A Urn shape B Inverted C Erect D Spindle shaped

1. Break Down the Problem

We need to determine the shape of the pyramid of biomass for the given food chain: Tree → Birds → Parasite. In this food chain, trees (producers) are at the base, followed by birds (primary consumers), and parasites (secondary consumers).

2. Relevant Concepts

In ecological terms:

• Producers (trees) generally have a high biomass at the base of the pyramid.
• Primary consumers (birds) have less biomass than producers, as they consume them.
• Secondary consumers (parasites) usually have an even lower biomass than primary consumers.

3. Analysis and Detail

1. Producers: Trees contribute a significant biomass as they convert solar energy into organic matter.
2. Primary Consumers: Birds rely on trees for food, so their biomass is lower than that of trees.
3. Secondary Consumers: Parasites feed on birds, leading to a decline in biomass even further due to their dependency on the lower level consumers.

Given that there is a gradual decrease in biomass from producers to primary and then secondary consumers, this results in a pyramid shape that is wider at the base and narrower at the top.

4. Verify and Summarize

In most ecosystems, the pyramid of biomass decreases as one moves up the trophic levels, confirming that its shape resembles that of a true pyramid.

Final Answer

The shape of the pyramid of biomass for the food chain Tree → Birds → Parasite is A. Urn shape.