An aquarium container is filled with water and colonies of aquatic plants and animals. Various protists are added and the aquarium is then sealed and placed on a
window ledge. After a period of time the aquarium appears to reach a state of
balance. are the group of organisms in the aquarium containing the
largest amount of energy.

This may be wrong but I think the answer is producers.

Explanation:

answer: although many types of viruses can cause a common cold, rhinoviruses are the most common culprit. a cold virus enters your body through your mouth, eyes or nose. the virus can spread through droplets in the air when someone who is sick coughs, sneezes or talks. theres your answer

explanation: