The medium provides an opposing force to slow down the wave.
Communication will be the answer
What’s the question Bc I don’t understand what u are trying to ask
Don't take my word for it but I think it is
1: proteins
2: energy from the sun, carbon dioxide, and water
3: this one is confusing me but I think it would be nutrients from food and oxygen
4: water
Again these are attempts I can't prove these