The pyramid of energy in a forest ecosystem is

Which of the following pyramids is always upright and can never be inverted?

Which of the following statements is true?

In a typical pyramid of numbers,if the top carnivores are represented as tertiary consumers at the final trophic level,how many total trophic levels are formed?

If a producer is a large tree that supports a number of herbivorous animals which are further attacked by ectoparasites,the pyramid of number shall be:

Identify the type of pyramid shown below.