Question

Which trophic level contains the organisms that are the source of all chemical energy used in an ecosystem?
Responses

decomposers
decomposers

producers
producers

parasites
parasites

herbivores

Answer 1

The trophic level that contains the organisms that are the source of all chemical energy used in an ecosystem is the **producers**. Producers, such as plants and phytoplankton, use photosynthesis to convert sunlight into chemical energy, forming the base of the food web.