The following food chain represents the flow of energy in a temperate woodland ecosystem:
Oak tree→Caterpillar→Blue tit→Parasitic mite \text{Oak tree} \rightarrow \text{Caterpillar} \rightarrow \text{Blue tit} \rightarrow \text{Parasitic mite} Oak tree→Caterpillar→Blue tit→Parasitic miteWhich of the following diagrams represents the correct shape for a pyramid of numbers for this food chain?
Diagram A
Diagram B
Diagram C
Diagram D