How does the law of conservation of mass explain how matter cycles through ecosystemsI need this asap anyone please help me

The matter

Explanation:

Since, according to the Law of Conservation of Mass, matter cannot be created or destroyed, all atoms of matter are cycled through Earth’s systems albeit in various forms. In other words, the Earth only receives energy from the sun, which is given off as heat, whilst all other chemical elements remain within a closed system.

not sure if this what   you'r looking for would be percent composition

there's the proffessional site that will you.