Final answer:
Grasses are at the beginning of this food chain as the primary producers.
Step-by-step explanation:
The living thing that is at the beginning of this food chain is grasses. In a food chain, producers are at the beginning and they are usually plants that convert sunlight into energy through photosynthesis. Grasses are the primary producers in this food chain and are eaten by mice. Mice are then consumed by snakes, which are preyed upon by hawks.
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