Solution:
Part 1:
- A graphic representation of the relationship between organisms at various trophic levels in a food chain is a ecological pyramid.
Part 2:
Ecological pyramids are of 3 types:
Biomass:
- Pyramid of biomass represents the biomass of organisms at different trophic levels of the food chain.
Energy:
- Pyramid of energy represents the amount of energy at different trophic levels.
Number:
- Pyramid of Number represents the number of organisms at different trophic levels of food chain.