The right answer would be "C".
No more than five trophic levels are present in an ecosystem, most have only 4.
Answer:
the answer is c
i did this test before in 8 grade
Answer: There were less flies stuck to the model of the zebra with stripes.
Closed system - energy can enter or leave the system but matter cannot
Open system - both matter and energy are exchanged freely between the system and the surroundings
