C. When there is an equal number of molecules on each side
Colloid- C)
Emulsion- A)
Heterogeneous- D)
Homogeneous- B)
Hope this helps!!
Every person has their own part to play or if you want to get scientific then a niche. And if somebody doesn't do their job then it could slow everyone else down. Maybe I don't fully understand the question, But I hope its right.
Break down to release of energy