Based on the information provided, what general rule can be applied to estimate the amount of energy typically transferred from level to level in an energy pyramid?
Energy Transfer in Percentage
Tropic Level
Aquatic
Producers → Primary 9.4
Primary Secondary 11.1
Secondary Tertiary 9.7
Terrestrial
9.2
9.8
9.2
1. 50% rule
2. 20% rule
3. 0% rule
4. 10% rule