How many trophic levels are in the follwing food chain sunflower beetle mouse?

In the food chain consisting of a sunflower, a beetle, and a mouse, there are three trophic levels. The sunflower represents the first trophic level as a primary producer, the beetle is the second trophic level as a primary consumer, and the mouse is the third trophic level as a secondary consumer. Each level reflects a step in the flow of energy through the ecosystem.