Use the following formula to find the efficiency of energy transfer between the harbor seal (2,500 Kcal) and a polar bear (375 Kcal).

To find the efficiency of energy transfer using the provided formula, we can plug in the numbers:

Given:
- Energy level transferred to the next level (polar bear's energy) = 375 Kcal
- Total energy input (harbor seal's energy) = 2,500 Kcal

Now, using the formula:

\[
\text{Efficiency} = \left(\frac{\text{Energy level transferred to next level}}{\text{Total energy input}}\right) \times 100
\]

\[
\text{Efficiency} = \left(\frac{375 \text{ Kcal}}{2500 \text{ Kcal}}\right) \times 100
\]

Calculating this gives:

\[
= (0.15) \times 100 = 15\%
\]

Thus, the efficiency of energy transfer between the harbor seal and the polar bear is **15%**.