The correct option is A.
The nature is organized in such a way that, one organism's waste is what the other organism will use as its own resources. For instance, during the process of photosynthesis, the oxygen that is produced as the by product of the photosynthesis process is what humans use to carry out their own breathing process.
Q1- D
q2- C
q3- B
I am assuming you only need one answer for each, good luck!
<span>The hyphae, or feeding structures, reach deep into the wood to obtain nutrients.</span>
An example of homeostasis would be sweating when the temperature is hot.