In a food chain, the total amount of living material is depicted by

Which of the following representations shows the pyramid of numbers in a forest ecosystem?

In a pond ecosystem,the pyramid of numbers is ............ .

Given below is one of the types of ecological pyramids. This type represents:

Given below are two statements.
Statement $I$ - Smaller the food chain, more is the available energy at each trophic level.
Statement $II$ - Pyramid of energy can also be sometimes inverted.
In the light of the above statements, select the correct option given below:

The pyramid of number of a parasitic food chain in a tree ecosystem is