Which of the following is not used to draw the ecological pyramid?

Fresh weight

The correct answer is Option (1) → Fresh weight 

Ecological pyramids are graphical representations of the distribution of energy or biomass among trophic levels in an ecosystem. They can be constructed using different parameters, but fresh weight is not commonly used in drawing ecological pyramids for the following reasons:

• Fresh weight includes both the biomass of organisms and the water content, which can vary significantly and make the comparison between trophic levels less accurate.
• Dry weight is typically used in ecological pyramids because it represents the biomass without the water content, providing a more consistent measure for comparing different trophic levels.

• The other options are used to draw ecological pyramids:

  • Dry weight is commonly used to represent biomass at different trophic levels in ecological pyramids.
  • Number of individuals can be used to represent the population size at each trophic level in a pyramid of numbers.
  • Rate of transfer of energy is used to represent energy flow in a pyramid of energy. This measures how much energy is transferred from one trophic level to the next.