Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?

Identify the possible link $\text{'}\text{'}\mathrm{A}\text{'}\text{'}$ in the following food chain.

Plant $\to$ insect - frog$\to \text{'}\text{'}\mathrm{A}\text{'}\text{'}\to$ Eagle

Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels?

Identify the likely organisms (a), (b), (c) and (d) in the food web shown below.