Answer:
The maximum amount of energy passed to a consumer is 20000J
Step-by-step explanation:
This is calculated by subtracting the 50000J of waste heat from the 10000J of solar energy, leaving a total of 30000J of energy in the grass's waste products. Subtracting the 30000J of energy in the grass's waste products from the 10000J of solar energy leaves a maximum amount of energy passed to a consumer of 20000J.