Question

upright pyramid is a characteristic feature of which of the following

Answer 1

As options are not given, answering with reference to a similar question from other sources. 

An upright pyramid is a characteristic feature of Pyramid of Energy. At each level, the amount of energy produced reduces and can never increase. This is because some amount of energy is wasted by the organism for respiration and other bodily activities. Trophic Level Transfer Efficiency or TLTE is a measure of the energy that is transferred between two trophic levels.

Answer 2

Upright pyramids are those pyramids that have broad bases representing the producers and taper towards the top. This indicates that the producers are more in biomass and number than the number of herbivores. The herbivores are in turn more in biomass and number when compared to carnivores. Energy is also highest at the lowest level and decreases as it goes to the upper levels.