These products of plants, algae, animals, and other organisms must be broken down (decomposed or decayed) before the nutrient elements can be recycled.
(These products of plants, algae, animals, and other organisms; must be broken down; T:before the nutrient elements can be recycled) (the nutrient elements; can be recycled; )
These products of plants, algae, animals, and other organisms the nutrient elements
must be broken down can be recycled
T:before the nutrient elements can be recycled