Let’s say your producer level began with 45000 kcal of energy
how much energy is at the primary consumer level?
how much energy is at the secondary consumer level?
how much energy is at the tertiary consumer level?

4500 energy is at the primary consumer

450 energy is at the secondary consumer 45 energy is at the tertiary consumer The reason for this is because each organism use 90% of energy for homeostasis or eternal balance and pass the 10% to another organism. Hope this helps.please add brainlist

Steel

Explanation:

During the second industrial revolution,which building because one of the most important in the world? rail roads made resources and products easier to transport