Dear student,
The food chain is as follows-
Grass------> Goat ----> Humans
In the above-given food chain, the first trophic level is grass which is consumed by a goat, here the goat is the primary consumer and the goat is in the second trophic level whereas the goat is consumed or eaten by humans. Humans in this food chain will act as a secondary consumer and humans are in the third trophic level.
Regards