The food web is as such:

According to the food web, I also thought of the interrelationships between the organisms and some key points:
- The Sun is the main source of energy
- The predation of each organism helps to keep the population of the organism in check, as if there are less primary consumers, there will be more producers, which will lead to overcrowding.
- The energy received at each trophic level is different, as the secondary consumer will receive a lesser percentage of energy from the producer as compared to the percentage received by the primary consumer from the producer. This is because the some of the energy is also used for life processes.