Answer: 200 kilocalories
Explanation:
According to the 10 per cent law of energy, only 10 percent energy is transferred from one tropic level to another tropic level.
The producers has the maximum amount of energy because they trap sunlight and make food by the help of process known as photosynthesis.
The energy from the producers is transferred to primary consumers. This energy is 10 per cent the total energy producers has.
If the producers have 2000 kilocalories then 10% of 2000 = 200. Hence the primary consumers will have 200 kilocalories.