Which ecological pyramid cannot be inverted and is only upright

The English Channel ecosystem exhibits an inverted biomass pyramid since the primary producers make up less biomass than the primary consumers. Pyramid ecosystem modeling can also be used to show energy flow through the trophic levels; pyramids of energy are always upright since energy decreases at each trophic level

Pyramid of energy, showing the rate of energy flow and/or productivity at successive trophic levels.

The correct name for n3-ion should be azide.