Ecological pyramid shows the number energy or biomass at each trophic level. Generally ecological pyramids are upright. However, one of the following pyramid is 'inverted'. Identify.

Ecological pyramid shows the number energy or biomass at each trophic level. Generally ecological pyramids are upright. However, one of the following pyramid is 'inverted'. Identify. Correct Answer Both 1 and 2

The correct answer is Both 1 and 2.

• In an aquatic ecosystem, the producers are small organisms with the least biomass and the biomass gradually increases towards the apex of the pyramid. Thus the pyramid of the biomass of aquatic ecosystems is inverted in shape.
• The pyramid of energy is always upright and vertical as during the flow of energy from one trophic level to another, there is a considerable loss of energy in the form of heat, respiration, mechanical energy, etc and thus, the highest energy is available to primary producers and lowest to tertiary consumers. 
• The pyramid of number of a tree ecosystem is inverted as the first trophic level is a single tree and the higher trophic levels have organisms more in number.