Plant absorb nitrogen gas from bacteria in the soil
They lack true tissues and organs and have no body symmetry. hope it helps
C is the answer to the question
Because they interfere witht he natural cycling of elements.
An example is crop harvesting. The practice of removing part or all of the crops grown from the soil accelerates the loss of nutrients from the soil. The cycling of nutrients from plant uptake and release is interrupted by crop removal.
Hope this helps!
Not entire sure because I haven't taken human anatomy but I'd guess it would have to be the digestive enzymes breaking it down