How does energy flow within an ecosystem

so the cycle of energy in the earth all depends on the different types of tropic levels in the ecosystem, or maybe even the use of solar power.

The plants as well they have energy in them that spreads to the earth. The photosynthesis process also helps it go through it

Explanation:

answer; i believe that the correct answer is (lung);

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.