To determine how much energy is transferred to the primary consumers, you can calculate 10% of the 10,000 kilocalories (kcal) produced.
The calculation is as follows:
\[ \text{Energy transferred} = 10,000 , \text{kcal} \times 0.10 = 1,000 , \text{kcal} \]
Therefore, the amount of energy transferred to the primary consumers is 1,000 kcal.