A snake that's eats a frog that's has eaten a insect that fed on a plant is a third level consumers
first level consumer
Second level producer
First level producer
First level producer: The plant
Second level consumer: The insect
First level consumer: The frog
Third level consumer: The snake
What makes the snake third level consumer
The snake is considered a third level consumer because it is at the top of the food chain in this scenario, feeding on the frog which is a second level consumer that ate the insect (a first level consumer) which fed on the plant (a first level producer). The snake is the organism that is highest in the food chain and consumes other consumers. This places it at the third trophic level.
All the interconnected feeding relationships in an ecosystem make up a food
web
Chain
Network
Interaction
Trophic level